Question 1

What happens when the forces on an object are balanced?

Accepted Answer

The object remains at rest or continues to move at a constant velocity

Answer

The object changes direction

Answer

The object speeds up

Answer

The object slows down

Question 2

What happens when the forces on an object are unbalanced?

Accepted Answer

The object accelerates in the direction of the net force

Answer

The object decelerates

Answer

The object changes direction

Answer

The object remains at rest

Question 3

Which of the following is an example of a balanced force?

Accepted Answer

Pushing a wall with equal force in the opposite direction

Answer

Throwing a ball into the air

Answer

Pulling a heavy box uphill

Answer

Swimming against strong currents

Question 4

Which of the following best describes inertia?

Accepted Answer

An object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and direction unless acted upon by an external force

Answer

An object at rest tends to move in a circular path

Answer

An object at rest tends to move in a straight line with constant speed

Answer

An object at rest tends to change its motion

Question 5

According to Newton's 3rd law of motion, for every action, there is an equal and opposite _______?

Accepted Answer

reaction

Answer

acceleration

Answer

mass

Answer

force

Question 6

What is the formula to calculate force according to Newton's 2nd law of motion?

Accepted Answer

Force = mass x acceleration

Answer

Force = mass + acceleration

Answer

Force = mass / acceleration

Answer

Force = mass - acceleration

Question 7

Two kids are pulling on opposite sides of a backpack, each with a force of 10 N. Which way does the backpack move?

Accepted Answer

It doesn't move

Answer

Left

Answer

Right

Answer

Up

Answer

Down

Question 8

The kid on the left lets go of the backpack while the kid on the right is still pulling it with a force of 10 N. The kid on the right and the backpack have a mass of 100 kg (big kid, heavy backpack!). What happens to the kid on the right?

Accepted Answer

He accelerates away from the kid on the left at 0.1 m/s/s

Answer

He accelerates away from the kid on the left at 10 m/s/s

Answer

He accelerates toward the kid on the left at 0.1 m/s/s

Answer

He accelerates toward the kid on the left at 10 m/s/s

Question 9

Which of the following is an example of an object experiencing balanced forces?

Accepted Answer

A bike moving in a constant speed and direction.

Answer

A soccer player leaping to head the ball.

Answer

A bird slowing down to land.

Answer

A bicycle turning a corner.

Question 10

Newton's second law, Force = mass x acceleration, means

Accepted Answer

As an object gets heavier, it will take more force to keep its acceleration constant.

Answer

An object's mass has no effect on its acceleration.

Answer

Force will accelerate an object regardless of its mass.

Answer

As an object gets lighter, it will take more force to keep its acceleration constant.

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