Newton's Law EXAM!

Science                                                                    

Laws of Motion Unit Test

There are a total of 30 questions on this test. Please record the letter of your answer choice on a blank piece of paper! Show your work!!!

S5.C2.PO2. Newton’s First Law

1. According to Newton’s first Law an object in motion…
1. will stop.
2. will remain in motion.
3. will speed up then slow down.
4. will remain at rest.

2. According to Newton’s first Law an object that is at rest …
1. will stop.
2. will remain in motion.
3. will speed up then slow down.
4. will remain at rest.

3. Which object would have the greatest inertia?
1. A tractor trailer
2. A small car
3. A motorcycle
4. A bicycle

4. When you slide across ice, friction is what ______.
1. Allows you to move forward.
2. Slows you down.
3. Speeds you up.
4. Keeps you standing up.

5. When forces on a moving object are balanced, that object will…
1. Stop.
2. Keep moving in the same direction with the same velocity.
3. Slow down.
4. Speed up.

6. A giant asteroid is headed towards Earth. Does the asteroid have a lot of inertia?
1. No, the asteroid will probably burn up in the atmosphere
2. Yes, the asteroid is unlikely to change its motion
3. No, the asteroid is unlikely to change its motion
4. Yes, the asteroid does have a lot of inertia and it will be very easy to change the motion of the asteroid if we use a super laser beam to shoot it out of the sky

7. You pull the tablecloth of a table. The glasses and plates don’t move at all! Which of Newton’s laws is responsible for this?
1. First Law
2. Second Law
3. Third Law
4. All of them

8. You are traveling in a spaceship, and when peering out the window you see a small antenna fall off of the spaceship into space. What will happen to the antenna?
1. It will continue with the same velocity forever
2. It will continue with the same velocity until it is acted on by another force
3. It will start to slow down
4. It will immediately stop because the space ship isn’t pushing it anymore

9. You kick a soccer ball into the air. According to Newton’s 1^st Law of Motion, why does it eventually slow down and stop moving?
1. The force of gravity pulls the ball towards the earth and friction between the outside of the ball and the air (air resistance) slows it down
2. You aren’t kicking the ball anymore, so it has no way to continue moving
3. You are bad at kicking soccer balls, and must not have kicked it hard enough
4. The soccer ball must not have been inflated enough; anytime you kick a soccer ball it goes on forever and ever and will never stop

10. Superman is super-strong, and can stop anything in motion. Which of the following objects will he have to use the most force to stop?
1. A snail
2. A thief in a getaway car
3. A crashing airplane
4. A runaway shopping cart

S5.C2.PO3. Describe how the acceleration of a body is dependent on its mass and the net applied force (2^nd Law).

11. What is the force of a truck if it has a mass of 100kg and an acceleration of 10 m/s²?

1. 10 N
2. 1,000 N
3. 100 N
4. 10,000 N

12. A 150kg egg is dropped from a height of 5 m and falls for 5 seconds.  If it hits the ground with a force of 50 N what was its acceleration?
1. .333 N
2. 3 m/s²
3. 3 N
4. .333 m/s²

13. Four vehicles are traveling with the same acceleration.  Which of the following would require the most force to come to a stop?
1. A toy car
2. A train
3. A bicycle
4. A unicycle

14. Which of the following represents the greatest force?
1. m = 15kg         a = 3 m/s²
2. m = 50kg         a = .5 m/s²
3. m = 10kg         a = 1 m/s²
4. m = 12kg         a = 3 m/s²

15. According to Newton’s second law, if we want to increase the acceleration of an object we must:
1. Increase the force
2. Decrease the mass
3. Both a and b
4. None of the above

16. What is the mass of a baseball that is accelerating at 9m/s² and hits a glove with a force of 99 N?
1. 9 Kg
2. 0.9 Kg
3. .09 Kg
4. 11 Kg

17. Sid the squirrel is sleepwalking.  He walks outside onto the highway, where he wakes up just in time to see a car coming right at him.  Sid knows that if the car hits him with a force of 1000 N, then he will die.  If the car has a mass of 20 kg and when it hits Sid he accelerates 80 m/s², what will happen to Sid?
1. He will die.
2. He will survive.
3. He will not get hit.
4. He will barely feel it

18. Which of the following represents the greatest mass?
1. F = 9                a =  3 m/s²
2. F = 5                a = 2 m/s²
3. F = 9                a = 2 m/s²
4. F = 8                a = 2 m/s²

19. You place 3 apples into a scale at the supermarket.  The scale accelerates downward at a rate of 10 m/s².  The scale also reads that the mass of the apples as 4 kg.  How much force are the apples pulling down on the scale with?
1. 30 m/s²
2. 12 g
3. 40 N
4. 40 m/s²

20. If the mass of an object increases, which of the following is true?
1. The force required to accelerate it increases.
2. It gets lighter.
3. Its growing.
4. The force required to accelerate it decreases.

S5.C2.PO4. Describe forces as interactions between bodies (3^rd Law).

21. How does a jellyfish move?
1. The jellyfish has jets inside of it.
2. It climbs through the water.
3. The jellyfish pushes against the water and water pushes back on the jellyfish
4. The current pushes the jellyfish pushes forward and the jellyfish reacts by swimming

22. Which one of the following statements is not supported by Newton’s 3^rd Law?
1. Forces come in pairs
2. For every action there is an equal and opposite reaction.
3. A force can be by itself.
4. Action and reaction forces

23. A basketball bounces because…
1. The reaction force of the ground pushes the ball up.
2. Gravity pushes the ball down.
3. Inertia stops the ball from going through the ground.
4. F= ma

24. An action force and its reaction force are
1. equal in size and direction.
2. equal in size and opposite in direction.
3. different in size but in the same direction.
4. different in size and direction.

25. Two skateboarders, coming from different directions, crash into each other but do not fall off of their skateboards. They both bounce back in the direction they came from. What is this an example of?
1. The first law of motion
2. Action and reaction forces
3. Acceleration and velocity
4. Terminal velocity

26. When you jump off of the ground, which forces are causing you to move upwards?
1. The force of your muscles against gravity
2. The action force of you pushing on the ground and the reaction force of the ground pushing back on you
3. The action force of your muscles acting on your legs and the reaction force of your legs pushing down
4. Gravity pushing you off of the ground

27. You accidentally walk into the glass door. Which law of motion explains why you bounce back?
1. “An object in motion stays in motion.”
2. F=ma
3. “For every action, there is an equal and opposite reaction.”
4. The law of gravity

28. Two students are on roller skates, and one pushes off of the other. What is this an example of?
1. Zero gravity
2. A chemical reaction
3. Action and reaction forces
4. Conservation of mass

29. You are standing on a skateboard and throw a large backpack to the right. What will happen as a result of this action?
1. You and the skateboard will move to the left
2. Nothing will happen
3. You and the skateboard will move to the right
4. You will definitely fall off of the skateboard

30. The space shuttle boosts off of the ground into space using ‘rocket science’. How does this happen?
1. The rocket pushes hot gases down (out of the rocket), the exploding gases push back against the rocket
2. The burning gas pushes down on the air and the air pushes back on the rocket
3. Because of the mass of the space shuttle, there is an increase in the force that it can lift off the Earth with
4. The space shuttle is made of material that is not affected by gravity, so the space shuttle needs just a gentle push to lift off

How SWEET it is! Newton's Third Law - Friday March 28th!

Catalyst: read this!! ----->  http://www.buzzfeed.com/simoncrerar/pictures-that-prove-australia-is-the-craziest?s=mobile

 

Name__________________________Period ___________

NEWTON'S THIRD LAW: ACTION AND REACTION FORCES

1. You hit a baseball with a force of 16N.

Sketch: 


ACTION: _______________________________

REACTION:  _______________________________

2. A rocket ship pushes out fuel with a force of 6000N.

3. You push a door closed with a force of 40 N.

4.  A diver dives off of a raft with a force of 30N.

5.  A tennis racquet hits a tennis ball with a force of 67N. 

6.  An octopus pushes water out of its body to move forward with a force of 120 N. 

7.  A book sits on a table with force of 24N. 

8.  Two people are standing on skateboards.  They push off of each other with a force of 16N.

9. A person on a skateboard pushes off of a wall with a force of 20N.
 

10. Karina kicks a bowling ball with a force of 60N.

Thursday, March 27th! Sweet 16 Day!!

Today we are practicing Newton's 2nd Law. Please show your work and write the answer to the following questions on a blank piece of paper.



Name _________________ Period 2______________

NEWTON'S SECOND LAW - F=ma


1. A shopping cart is pushed by a little girl. The acceleration of the shopping cart is 4 m/s2. The shopping cart is empty and has a mass of 1 kg. What force did the girl push the cart with?

2. The girl decides to buy lots of ice cream. The mass of the cart increases, and it now has a mass of 5 kg. The cart accelerates at 4 m/s2. What force did the girl push the cart with?

3. The girl’s mom makes her put most of the ice cream back. The cart now weighs 2 kg. The girl again pushes it, and it accelerates at 4 m/s2. What force did the girl put on the cart?

4. Jennifer kicks a soccer ball (1 kg) with a force of 20 Newtons.  What is the acceleration of the ball?

5. Lizbeth kicks a soccer ball (1 kg) with a force of 30 Newtons.  What is the acceleration of the ball?

6. Brian hits a baseball (0.5 kg) with a force of 20 Newtons.  What is the acceleration of the ball?

7. Jorge throws a baseball (0.5 kg) with a force of 10 Newtons.  What is the acceleration of the ball?

8. Steve Nash is shooting a free throw. He applies 16 Newtons of force on a basketball that weighs 2 kg. What is the acceleration of the ball?

9. Sponge Bob is on a gameshow and has to decide which challenge to complete: Challenge A, where he has to pull a wagon of 40 kg to an acceleration of 5 m/s2, or Challenge B, where he has to pull a wagon of 20 kg to an acceleration of 7 m/s2. Which challenge will be easier for Sponge Bob to complete? Why?

10. What is the mass of a pickup truck if a tow truck pulls it with a force of 4200 Newtons and it accelerates 7 m/s2?

11. What is the mass of a boxing bag if Jorge kicks it with a force of 100 Newtons and it accelerates 12.5 m/s2?

12. What is the mass of a stroller if a little girl pushes it with a force of 10 Newtons and it accelerates 4 m/s2?

Wednesday - Newton's First Law

Name_________________________                                Period ___________________________

Examples of Newton’s First Law Practice

Scenario 1:

Your skateboard is traveling West at 10m/s.  You run into a bench which stops the skateboard.  Show what would happen to you and the skateboard.

Scenario 2: A dish is at rest on a table cloth.  You pull the table cloth quickly.  Show and explain what would happen to the dish and why.

Scenario 3: You are standing on a bus traveling 25 miles per hour.  The driver pushes on the gas pedal to accelerate the bus to 50 miles per hour.  Show and explain what would happen to you and the car.

Scenario 4: Your kid brother is in a shopping cart.  You wheel him in a straight line down the ice cream aisle.  At the end of the aisle, you take a sharp turn left and your brother flies out of the car.  Show and explain why this would happen.

STP Post Test

Take it here!
https://docs.google.com/forms/d/1LdLD3Ecr077HT_bxhOyhwScxOv8hzCgc3H4D7SPyWIg/viewform

Tuesday - Net Force

Yes! It's Tuesday! Three days until UofA plays in the Sweet Sixteen!

When I instruct you to do so, click this link: 

http://phet.colorado.edu/sims/html/forces-and-motion-basics/latest/forces-and-motion-basics_en.html

Assignment:

Name_________________________                                Period ___________________________

SITUATIONS

1. Mr. Richardson and Ms. Slivova are fighting over a cookie. Mr. Richardson pulls to the right with a force of 20 N and Ms. Slivova pulls to the left with a force of 35 N.  Draw a diagram, calculate the net force, and determine if the forces are balanced or unbalanced.

2. Erik and Ashlyn are trying to push Mr. Richardson in his chair. Erik pushes to the right with 10 N of force and Ashlyn helps by pushing in the same direction with 11 N of force. Draw a diagram, calculate the net force, and determine if the forces are balanced or unbalanced.

3. The book is resting on the desk.  Gravity is pulling it down with a force of 2N, and the desk pushes it back up with a force of 2N. Draw a diagram, calculate the net force, and determine if the forces are balanced or unbalanced.

4. Johnny Depp pushes on a set of doors with a force of 7N.  Brad Pitt pushes on the same set of doors with a force of 10N.  Draw a diagram, calculate the net force, and determine if the forces are balanced or unbalanced.

5. Jessica and Karen both want the last Snickers bar. Jessica is pulling to the right with 15 N of force and Karen is pulling to the left with 10 N of force. Draw the diagram below and calculate the net force.

6. Vanessa and Omar are trying to move Mr. Mitchell’s desk. Vanessa pushes with 20 N of force and Omar pushes in the same direction with 15 N of force. Draw the diagram below and calculate the net force.

Welcome Back! March 24th

ohhhhhh. Poor ASU. At least they are good academic school.........oh wait. 

Be nice to Mr. Carranza, he had a rough weekend. #BEARDOWN #CATS





Catalyst

1. Read this article: http://www.theverge.com/2014/3/21/5533054/asian-carp-american-waterways
2. Tell your partner: how did the Asian Carp get to the United States from China?
3. On Socrative, explain two strategies ecologists are trying to keep the invasive Asian Carp from reaching the great lakes

Slope Intercept - Find missing coordinate

X      Y
2       3
4       5
6       7
133   ?




X     Y
-4     -2
4       2
10     ?



X     Y
1       120
4       150
7        ?

Acceleration From Graphs

We need to figure out the acceleration during each section of the graph

Graph A

1. What is the acceleration between t=0 and t = 2
2. What is the acceleration between t=2 and t=10
3. What is the acceleration between t=10 and t=12
4. What is the acceleration between t=12 and t=16

Graph B

1. What is the acceleration between t=0 and t=10?
2. What is the acceleration between t=10 and t=15?
3. What is the acceleration between t=15 and t=40?
4. What is the acceleration between t=40 and t=55?

Graph C

Relationships Test Questions

1. Desert mistletoe is a shrub plant that produces red berries, which are eaten by birds. The hard seeds in the fruit then pass through the bird and are left on the branch of a tree to grow.  There, the mistletoe can sprout and grow its roots inside of a host tree, where it steals water and nutrients from the tree through its roots.  Which of the following best describes the relationships that mistletoe has with these two organisms, the bird and the tree?
   
   

a. mutualism with the bird; mutualism with the tree

b. mutualism with the bird; parasitism with the tree

c. commensalism with the bird; mutualism with the three

d. parasitism with the bird; parasitism with the tree

2. In the 1930s, farmers brought a plant species called buffelgrass from South Africa to the southwestern United States. They did so to reduce erosion rates and provide food for livestock. buffelgrass thrived and spread throughout the southwest, particularly in Arizona. How is the relationship between buffelgrass and other plant species best categorized?

a. native – non-native                          b. parasitism

c. commensalisms                               d. predator-prey

3. In a desert environment, cactus wrens often build their nests in cholla cactus to avoid predators. This behavior does not hurt the cactus. Which type of relationship do cactus wrens and cholla cactus demonstrate?
   
   

a. native – non-native                          b. parasitism

c. commensalism                                d. competition

e. mutualism

4. Although Hyenas are shown in movies as cowards, they are actually ferocious hunters. Lions often wait for hyenas to kill their prey, such as zebra, and then scare them off and claim the zebra for themselves. What relationship is this an example of?   
   
   

a. native – non-native                          b. parasitism

c. commensalisms                               d. competition

e. mutualism

5. On your answer sheet come up with your own example of a symbiotic relationship. Label the type of relationship and the organisms involved.