Unit 4: Mechanical Energy & Motion

What is the MOST reasonable explanation for why you go farther skating on a wood floor than on a thick carpet?

• The skates weigh more on the carpet
• You weigh more on the floor
• The carpet has more resistance
• The wood floor has more traction

If a toy car rolls along a sidewalk, that is level, what would cause it to lose its kinetic energy?

• Heat
• Friction
• Magnetism
• Temperature

Tags

NGSS.MS-PS3-5

Anna made a ramp out of some books and a piece of wood. She can change the height by adding more books under the piece of wood. She rolls a marble down each ramp.  At the bottom of which ramp would the marble be traveling the fastest?

• 1 book
• 2 books
• 3 books
• 4 books

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

NGSS.MS-PS2-2

What kind of energy transformation is occurring when a battery is operating a flashlight?

• Heat energy is changed to light energy
• Light energy is changed to heat energy
• Potential energy is changed to kinetic energy
• kinetic energy is changed to chemical energy

On a roller coaster, the potential energy is greatest when it’s at the highest point?

• True
• False

Tags

NGSS.MS-PS3-2

An item at rest has _____________enrgy; an item in motion has _______________energy.

• some / a little
• potential / kinetic
• thermal / cold
• lazy / fun

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

Distance and mass can affect the amount of potential energy an object has?

• True
• False

Tags

NGSS.MS-PS3-2

If Mrs. Young went 300 miles in 5 hours, what was her average speed? 

• 60 mph
• 21 mph
• 150 mph
• 20 mph

Two teachers ran on a track for 160 meters.
Ms. Goodman finished in 38 seconds.
Mr. Gomez finished in 49 seconds. 
How much faster was the average speed of Ms. Goodman than the average speed of Mr. Gomez? 

• 1 m/s
• 87 m/s
• 11 m/s
• 13 m /s 

Tags

NGSS.MS-PS3-1

Abby ran 300 meters in 30 seconds. What was her average speed? 
Speed= distance / time

• 10 m/s
• 15 m/s
• 20 m/s
• 1 m/s

Tags

NGSS.MS-PS3-1