REVIEW: Force, Motion & Energy

A rock rests completely still at the top edge of a tall cliff. The rock has-

• no kinetic energy or potential energy

• a lot of kinetic energy but no potential energy

• a lot of potential energy by no kinetic energy

• both kinetic energy and potential energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-4

Two different forms of energy can change from one form to another. Which action below involves these energy transformations: chemical to electrical to light?

• Baking bread in a gas-burning oven

• Lighting a campfire with a match

• Plugging a lamp into an electrical outlet

• Turning on a battery-powered flashlight

At a factory, three different carts travel along a track that is 84 m long. The table shows the time it takes each cart to travel the length of the track once.

What is the average speed of Cart A as it travels along the track, expressed in m/s?

• 3.0

• 10

• 0.8

• 2.8

Tags

NGSS.MS-PS3-1

Which units indicate acceleration?

• cm/s²

• g/cm³

• km/h

• m²

Four graphs below show the distance it takes an object to travel over time along a straight path.

Which graph shows an object that is accelerating?

• 
• 
• 
• 

A force of 5 N pushes a ball to the right, and a force of 7 N pushes the ball to the left.

How will the forces affect the ball's motion?

• A net force of 0 N will cause the ball to remain motionless.

• A net force of 2 N will cause the ball to accelerate to the left.

• A net force of 2 N will cause the ball to accelerate to the right.

• A net force of 12 N will cause the ball to accelerate to the left.

Tags

NGSS.MS-PS2-2

The picture shows a swinging weight hung from the ceiling.

At what position on the swing does the weight have the greatest kinetic energy and least potential energy?

• Position J

• Position K

• Position L

• Position M

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

Which energy transformation occurs when you light a match?

• chemical energy to light energy

• light energy to chemical energy

• kinetic energy to potential energy

• chemical energy to electrical energy

A speed skater travels 1.5 laps on the track shown in 48 seconds.

What is the average speed of the skater in m/s?

(Remember: Speed=distance / time)

• 13 m/s

• 9 m/s

• 8 m/s

• 19,968 m/s

Which of the following is NOT true when describing speed?

• It is a measure of how fast something is moving.

• It is a measure of the distance traveled in a given direction

• It is the distance traveled per unit of time.

• It is always measure as a unit of distance divided by a unit of time.