Lab: Newton's Second Law

Question 1

A box that has a mass of 80 kg slides down a ramp with a 30 degree angle. The free-body diagram shows the forces acting on the box.

Revolt · Accepted Answer

4.9 m/s2

Question 2

An object pulled to the right by two forces has an acceleration of 2.5 m/s2. The free-body diagram shows the forces acting on the object.

Revolt · Accepted Answer

490 N

Question 3

Which quantity may be calculated directly using Newton’s second law of motion?

Revolt · Accepted Answer

weight

Question 4

A rocket experiences a constant force even as the amount of fuel in its fuel tanks decreases. What happens to the acceleration of the rocket as it runs out of fuel?

Revolt · Accepted Answer

The acceleration increases because the mass decreases.

Question 5

A baseball has a mass of 145 g. A bat exerts a force of 18,400 N on the ball. What is the acceleration of the ball?

Revolt · Accepted Answer

1.27 x 105 m/s2

Question 6

Tracy stands on a skateboard and tosses her backpack to her friend who is standing in front of her. Which best describes the acceleration Tracy experiences?

Revolt · Accepted Answer

It is less than the acceleration of the backpack because she has a greater mass.

Question 7

What is the mass of an object if a net force of 8.0 N causes it to accelerate at 1.1 m/s2?

Revolt · Accepted Answer

7.3 kg

Question 8

For problems that involve an object accelerating along an inclined plane, how can the weight be used to determine the force component that causes motion?

Revolt · Accepted Answer

The weight times the sine of the angle of the ramp acts down along the ramp.

Lab: Newton's Second Law Answers

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