Quiz about Forces Study Guide

Question 1

A group of students is playing tug-of-war. The students on both sides of the rope are pulling with equal force so that the rope is not moving. This is an example of

Accepted Answer

balanced forces

Answer

unbalanced forces

Answer

acceleration

Answer

displacement

Question 2

A firefighter feels the hose pushing backwards onto him as he uses it to put out a fire. What is the most likely cause of this?

Accepted Answer

the escaping water exerts an equal and opposite force on the hose

Answer

The hose material is very elastic

Answer

since the hose is at rest, it tends to stay at rest

Answer

the force exerted on the water equals the mass of the water times its acceleration

Question 3

If the same force is applied to each of the balls pictured below, which one will have the LEAST acceleration?

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 4

Which of the following is measured in Newtons?

Accepted Answer

weight

Answer

momentum

Answer

mass

Answer

acceleration

Question 5

The upward force on an object falling through the air is _______.

Accepted Answer

air resistance

Answer

momentum

Answer

inertia

Answer

gravity

Question 6

The relationship among mass, force, and acceleration is explained by __________.

Accepted Answer

Newton's 2nd law

Answer

Newton's 1st law

Answer

Newton's 3rd law

Answer

Law of Conservation of Momentum

Question 7

According to Newton's Laws, for any object, the greater the force that's applied to it, the greater its _________ will be.

Accepted Answer

acceleration

Answer

inertia

Answer

gravity

Answer

size

Question 8

The size of the gravitational force between two objects depends on their __________.

Accepted Answer

masses and the distance between them

Answer

frictional force

Answer

inertia

Answer

speed and direction

Question 9

An astronaut is planning a trip to a newly-discovered planet. According to the Law of Universal Gravitation, the astronaut's weight on the new planet will be greater than his weight on Earth if:

Accepted Answer

the new planet has more gravity than Earth.

Answer

the new planet has less gravity than Earth.

Answer

the new planet has the same gravity as Earth.

Answer

the gravity of the planet doesn't matter. Weight is the same everywhere in the universe.

Question 10

"For every action there is an equal and opposite reaction" describes which law?

Accepted Answer

3rd law

Answer

Law of Conservation of Momentum

Answer

1st law

Answer

2nd law

Question 11

The ______ of an object does not change, but its ______ can, depending on location.

Accepted Answer

mass, weight

Answer

weight, mass

Question 12

A student drops a feather and rock at the same time from Mrs. Roberts' window. If air resistance wasn't a factor, what should she observe?

Accepted Answer

The rock and feather fall at the same rate.

Answer

The rock falls slower than the feather

Answer

The rock falls faster than the feather.

Answer

The rock and feather remain suspended and do not fall.

Question 13

A man weighing 800 N is standing on a chair. In order to support the man, what force is the chair exerting?

Accepted Answer

800 N up

Answer

less than 800 N

Answer

greater than 800 N

Answer

800 N down

Question 14

An object that is falling freely has a constant what?

Accepted Answer

acceleration

Answer

speed

Answer

velocity

Answer

nothing is constant

Question 15

When two forces on the same object are equal and opposite, these forces are called ________ forces.

Accepted Answer

balanced

Answer

net

Answer

unbalanced

Answer

frictional

Question 16

What is the acceleration of the box in the picture below?

Accepted Answer

12 m/s2

Answer

7,500 m/s²

Answer

300 m/s2

Answer

25 m/s2

Question 17

What is the weight of the box in the picture below?

Accepted Answer

245 N

Answer

25 kg

Answer

25 N

Answer

245 m/s2

Question 18

As the mass of an object increases, its inertia will __________.

Accepted Answer

increase

Answer

decrease

Answer

stay the same

Answer

be unable to determine

Question 19

What is the net force of the block below?

Accepted Answer

2 N left

Answer

8 N right

Answer

8 N left

Answer

2 N right

Question 20

Which of the following best describes how a swimmer moves through the water?

Accepted Answer

The swimmer pushes backwards on the water and the water pushes with an equal but opposite force back on the swimmer.

Answer

The swimmer pushes off the side of the pool and his inertia keeps him moving through the water.

Answer

The swimmer uses friction to push himself through the water.

Answer

Air resistance limits the swimmer's speed.

Question 21

An object will move at a constant velocity unless an unbalanced force acts upon it.

Accepted Answer

Newton's 1st Law

Answer

Force

Answer

Air Resistance

Answer

Terminal Velocity

Question 22

Push or pull one body exerts on another.

Accepted Answer

force

Answer

Newton's 1st Law

Answer

Air Resistance

Answer

Inertia

Question 23

A friction-like force that opposes the motion of objects that move through the air.

Accepted Answer

air resistance

Answer

gravity

Answer

momentum

Answer

weight

Question 24

The highest velocity a falling object will reach.

Accepted Answer

terminal velocity

Answer

weight

Answer

Newton's 2nd law

Answer

gravity

Question 25

Tendency of an object to resist changes in motion.

Accepted Answer

inertia

Answer

gravity

Answer

mass

Answer

momentum

Question 26

The attraction any two objects have on one another.

Accepted Answer

gravity

Answer

force

Answer

Newton's 3rd law

Answer

Law of Conservation of Mass

Question 27

The force of gravity on an object.

Accepted Answer

weight

Answer

mass

Answer

inertia

Answer

Newton's 3rd Law

Question 28

A net force acting on an object causes the object to accelerate in the direction of the net force.

Accepted Answer

Newton's 2nd Law

Answer

Newton's 3rd Law

Answer

Newton's 1st Law

Answer

gravity

Question 29

Related to the amount of force needed to change an object's motion.

Accepted Answer

momentum

Answer

inertia

Answer

gravity

Answer

Terminal Velocity

Question 30

What is the momentum of a rock with a mass of 5 kg being thrown at a velocity of 25 m/s towards a wall?

Accepted Answer

125 kg * m/s

Answer

15 kg * m/s

Answer

250 kg* m/s

Answer

5 kg * m/s

Question 31

What is the force on object with a mass of 6 kg and an acceleration of 2 m/s² ?

Accepted Answer

12 N

Answer

42 N

Answer

3 N

Answer

24 N

Question 32

Which object would have the most momentum?

Accepted Answer

fast car

Answer

falling feather

Answer

parked car

Question 33

Which object would have the least momentum?

Accepted Answer

parked car

Answer

falling feather

Answer

fast car

Question 34

If an object is at rest, then there are no forces acting upon the object.

Accepted Answer

False

Answer

True

Question 35

It would take an unbalanced force to cause an object to accelerate from rest

Accepted Answer

true

Answer

false

Question 36

A more massive object has more inertia than a less massive object.

Accepted Answer

True

Answer

False

Question 37

When a student runs and kicks a ball, they have applied an ___________ force to move the ball.

Accepted Answer

Unbalanced

Answer

Balanced

Answer

Magnetic

Answer

Spring

Question 38

What Unit do we Measure Force in?

Accepted Answer

Newtons

Answer

Joules

Answer

Force

Answer

Kilograms

Question 39

A person not paying attention while skateboarding hits a rock. The skateboard stops...they don't.

Accepted Answer

The Law of Inertia (1st law)

Answer

The Law of Acceleration (2nd law)

Answer

The Law of Conservation of Momentum

Answer

Action Reaction Law (3rd law)

Question 40

A 20 kg bike accelerates at 10 m/s2. what was the force

F = m x a

Accepted Answer

200 Newtons

Answer

25 Newtons

Answer

20 Newtons

Answer

10 Newtons

Question 41

Newton's third law states that any action will have a(n) _______ and ______ reaction

Accepted Answer

Equal and opposite

Answer

Equal and similar

Answer

Equal and different

Answer

Greater and opposite

Question 42

If there is a big mass, it would need a stronger force to accelerate it. Which law does this describe?

Accepted Answer

2nd law

Answer

3rd law

Answer

1st law

Question 43

What force slows objects down and keeps them from moving?

Accepted Answer

Friction

Answer

Acceleration

Answer

Gravity

Answer

Net Force

Question 44

Determine the accelerations that result when a 12-N net force is applied to a 3-kg object.

Accepted Answer

4 m/s

Answer

3 m/s

Answer

4 ft/s

Answer

13 m/s

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