Forces and Motion Test Review

The force that causes a barge (large boat) to move forward has:

• strength but not direction

• both strength and direction

• direction but not strength

• neither strength nor direction

If the forces acting on the barge do not add up to zero, the barge:

• must be moving at a constant speed

• must be at rest

• must be moving in a straight line

• must be changing speed or direction

Tags

NGSS.MS-PS2-2

What is true about a barge when it is at rest before it starts moving?

• No forces are acting on it

• Only one force is acting on it

• Multiple forces are acting on it but they add to zero

• Multiple forces are acting on it and they combine into a large force

In order for the barge to experience a change in speed or direction, what must be true?

• the forces acting on it must be equal and opposite

• there can only be one force acting on it

• the sum of all forces must be zero

• the net force acting on it must be greater than zero

Tags

NGSS.MS-PS2-2

The change in the barge’s speed depends on:

• the mass of the barge, only

• the force exerted by the pusher boat, only

• the mass of the barge AND the force exerted by the pusher boat

• none of these

Tags

NGSS.MS-PS2-2

Which net force acting on a barge will cause it to have the largest change in motion?

• 0 N

• 100,000 N

• 500,000 N

• all of these net forces would cause the same change in motion

Tags

NGSS.MS-PS2-2

A barge that starts at rest experiences a positive net force for 5 minutes and then experiences zero net force for the next 5 minutes. The barge is moving in a straight line for the entire 10 minutes. What will happen to the barge’s speed throughout the 10 minutes?

• The barge will speed up and then be motionless.

• The barge will speed up and then move at a constant speed.

• The barge will move at a constant speed then will slow down.

• The barge will move at a constant speed and then will be motionless.

Tags

NGSS.MS-PS2-2

In order for an object to remain at rest, there must be __________ forces acting on the object.

• balanced

• unbalanced

• magnetic

• electrical

In order for an object to begin to move from a position of rest, there must be __________ forces acting on the object.

• balanced

• unbalanced

• magnetic

• electrical

Tags

NGSS.MS-PS2-2

A toy car that was at rest now has a net force of zero acting upon it. This means that the car

• is moving backward

• is speeding up

• is motionless

• is slowing down