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NEWTONIAN MINI-TEST: practice problems

1. What is the magnitude (size) of the missing force in the figure diagrammed below?  

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2. What is the magnitude (size) of the missing force in the figure diagrammed below?  

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NEWTONIAN MINI-TEST review problems

 

 What is the magnitude (size) of the missing force in the figure diagrammed below?

 

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3. What is friction and how

 

 

3. What is friction and how does it 3. What is friction and how does it affect motion?

 

4. Describe inertia. Give an example.

 

5. Describe the difference between mass and weight.

 

6. What is meant by the term "net force"? 

 

7. A loaded elevator is moving at constant velocity upward. The elevator is supported by two cables, each pulling upward with a force of 3500 N. The elevator itself has a mass of 500 kg.

            a.    Draw a free body diagram of this system.

b.    Are any of the forces equal, greater, or less than each other? EXPLAIN.

             c.    Find the mass inside the elevator.

 

 

 

 

 

 

 

 

8. A ball rolls down a uniform-slope ramp. Describe the acceleration of the ball.

 

 

 

 

 

 

 9.  A toy is dragged at constant velocity to the right along a rough floor by a child. Draw a free-body diagram of the toy. Show the relative magnitudes of the various forces and describe each in words.

10. The toy is now being accelerated to the right along a rough floor by a child. Draw a free-body diagram of the toy. Show the relative magnitudes of the various forces and describe each in words. 

11. Nellie Newton holds an apple weighing 1 N at rest on the palm of her hand. The force vectors shown are the forces that act on the apple.

 

Since the apple is at rest, the net force on the apple is _______________. Explain.

 

 

12. Little Nellie Newton wishes to be a gymnast and hangs from a variety of positions as shown. Since she is not accelerating, the net force on her is zero. This means the upward pull of the rope(s) equals the downward pull of gravity. She weighs 300 N.

 

Enter the scale reading, in Newtons, for each case.

 

A 

 

B 

 

C 

 

D 

 

E 

 

F 

 

 

 

 

A

B

C

D

E

F

 

 

13. Explain a few geological forces AND how they shape the Earth.

 14. What is the acceleration due to gravity for the Earth?

 

N

Ffriction

W

Fpush
15.  Look at the diagram to the right for the following questions (W = Fg)

Are there any balanced forces acting on the freezer? 
If so, what are they?

  

16.  Is there a net force acting on the freezer?  If so, label it on the diagram.  Then, describe which forces interact and how they interact to produce the net force.

 17.  Describe the motion of the freezer.  Will its velocity change?  If yes, how?

 18.  Write Newton’s First Law of Motion in your own words. 

 19.  According to Newton’s 2nd Law of Motion…

For the same mass, more force produces ____________ acceleration.

For the same force, more mass produces ____________ acceleration.

 

20.  A landslide has a force of 4560 N and accelerates at 2.5 m/s2. What is the mass of the landslide? 

21.  If your mass is 60 kg then what is your weight on Earth? Remember weight is a FORCE.

 

These questions are only to provide you with help. Make sure that you look over all notes, labs/activities, assignments from class. The class website will help as well.

Mini – Test:

bullet Geological Forces
bullet F=ma calculations
bullet Fw=mg calculations
bullet free body diagrams
bullet First Law of Motion: Inertia
bullet Second Law of Motion

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