Forces and Newton's Laws

Question 1

The kick delivers a force of 3000 N left on the board. The force that acts on the foot is:

Accepted Answer

3000 N right

Question 2

Which of Newton's Laws is also called the Law of Inertia?

Accepted Answer

1st Law

Question 3

A car's brakes cause a force of 7000 N. If the car is 1000 kg what is the acceleration rate?

Accepted Answer

7 m/s2

Question 4

If the ropes have equal tensions. What is the tension of the rope on the right?

Accepted Answer

24.5 N

Question 5

Based off of the v vs. t graph, which of the statements must be true:

Accepted Answer

the net force is opposite the direction of motion

Question 6

What is the direction of the net force acting on the bear in the picture?

Accepted Answer

right

Question 7

All of the forces acting on a ball are balanced, therefore the ball must:

Accepted Answer

have a constant velocity

Question 8

Only force acting on a rocket ship in space is a constant force from its engine. The rocket:

Accepted Answer

is accelerating

Question 9

Based on your answer to the previous question, what do you know about the ball's motion?

Accepted Answer

The ball will be accelerating left

Question 10

Which is not a type of friction?

Accepted Answer

normal

Question 11

What is the direction of the net force acting on the bear in the picture?

Accepted Answer

The net force is zero

Question 12

Assuming no air resistance, how many forces are acting on the woman in the picture?

Accepted Answer

1

Question 13

This previous question is explained by which of Newton's laws?

Accepted Answer

3rd

Question 14

The tension on the cable on the right is 50 N. What is the mass of the ball if it is on Earth?

Accepted Answer

10.20 kg

Question 15

Which statement is true about inertia?

Accepted Answer

objects with more mass have more inertia

Question 16

A 20 N falling object encounters 5 N of air resistance. The net force on the object is:

Accepted Answer

15 N downwards

Question 17

Which of the following would increase friction between a chair and the floor?

Accepted Answer

have someone sit in the chair

Question 18

If the action force is the force by the string on the arrow, the reaction force is:

Accepted Answer

the arrow's push back against the string

Question 19

What does the net force cause the bear to do?

Accepted Answer

accelerate to the right

Question 20

An object following a straight-line path at a constant speed must:

Accepted Answer

have no net force

Question 21

The picture shows a force diagram for the sled. If all FORCES ARE BALANCED, the sled must:

Accepted Answer

have a constant velocity

Question 22

Fill in the blank: Isaac Newton would have understood the __________ of the situation!

Accepted Answer

gravity

Question 23

Which is not a way to represent Newton's 2nd law?

Accepted Answer

m = a/f

Question 24

What is the mass of a 30 kg object on Earth?

Accepted Answer

30 kg

Question 25

If these are the only two forces acting on the ball, what is the net force?

Accepted Answer

4 N left

Question 26

A 30 kg block and a 3 kg ball are dropped on Earth. The weight of the block is:

Accepted Answer

10 times as much as the ball

Question 27

Based on the v vs. t graph, which of the following must be true:

Accepted Answer

all of the forces are balanced

Question 28

If an object's mass is increasing while a constant force is applied, its acceleration will:

Accepted Answer

decrease

Question 29

A box weighs 8 N when held at rest above your head. What is the net force on the box?

Accepted Answer

0 N

Question 30

A sky diver is falling at a constant velocity. The air resistance acting on him must be:

Accepted Answer

equal to his weight

Forces and Newton's Laws

Questions 30

Forces and Newton's Laws

Questions 30