Newton's 3 Laws Review

Question 1

Which Law states F = ma?

Accepted Answer

Newton's 2nd Law

Question 2

What is the weight of a 1200 kg car?

Accepted Answer

120 N, 12000 N

Question 3

Which of the following statements is FALSE?

Accepted Answer

an object that is accelerating is at equilibrium

Question 4

A skater pushes with 35 N. Ignoring friction, if she moves at 0.75 m/s2, what is her mass?

Accepted Answer

46.67 kg

Question 5

A 8,000 N force is applied to a 920 mass. What rate does it accelerate at?

Accepted Answer

8.70 m/s2

Question 6

Which law applies: If you apply the same force on a more massive object, it accelerates slower

Accepted Answer

Newton's 2nd Law

Question 7

The resistance to change in motion is...

Accepted Answer

inertia

Question 8

Which of the following has the greatest inertia?

Accepted Answer

a passenger airplane

Question 9

Which of the following has the least inertia?

Accepted Answer

a feather

Question 10

Which law best fits the situation: When you sit in a chair, the chair pushes up against you

Accepted Answer

Newton's 3rd Law

Question 11

This Law states that every force has an equal and opposite force

Accepted Answer

Newton's 3rd Law

Question 12

The amount of force gravity exerts on a mass is...

Accepted Answer

weight

Question 13

Gravity pulls on a skydiver with 810 N. At terminal velocity, what is his air resistance?

Accepted Answer

810 N

Question 14

What is the weight of a 400 kg horse?

Accepted Answer

4000 N

Question 15

What force is needed to accelerate a 55 kg cart 2.5 m/s2?

Accepted Answer

137.5 N

Question 16

This Law states an object in motion or at rest will stay in its state until acted on by a force

Accepted Answer

Newton's 1st Law

Question 17

An bicycle moves to the east with a force of 50 N. The ground friction is 8 N. Find net force

Accepted Answer

42 N east

Question 18

A force that resists movement when to masses move against each other is...

Accepted Answer

friction

Question 19

Which Law applies? When pushing a cart down a hallway, it resists turning a corner.

Accepted Answer

Newton's 1st Law

Question 20

A press applies 1800 N on a surface of 1.5 m by 2.0 m; what is the pressure?

Accepted Answer

600 Pa

Questions 20