PhysicsLAB: net F = ma

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net F = ma

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1. Which of the following objects has the greatest inertia?

a 2-kg mass moving at a constant velocity of 100 m/s, E
a 4-kg mass moving at a constant velocity of 2 m/s, E
a 2-kg mass moving at a constant velocity of 20 m/s, E
a 6-kg mass at rest

Explain why you made your choice.

2. Which object could be moving with constant velocity along a straight line path if the only forces acting on it are those shown in each diagram?

ABC

Explain why you made your choice.

3. A certain force F gives a mass M an acceleration of a. The same force F would therefore give a mass of 2M an acceleration of ____.

2aaa/2a/4

Explain why you made your choice.

4. A certain force F gives a mass M an acceleration of a. A force of 6F would therefore give a mass of 2M an acceleration of ____ .

12a3aaa/3

Explain why you made your choice.

5. Which of the following objects is more massive?

A force F of 100 N pulls to the right causing this mass to accelerate at 25 m/sec² to the right
A force F of 50 N pulling to the right causes this object to accelerate to the right at 10 m/sec²

Explain why you made your choice.

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

10 N20 N30 N40 N

Explain why you made your choice.

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

10 N14 N20 N30 N

Explain why you made your choice.

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