Speed and Energy

Two model trains are running on tracks that are lined up next to each other.

The two trains are not moving at the same speed. What would cause one train to move faster than the other?

• The slower train’s cars have less mass.

• The faster train has more energy.

• The faster train has a wider track.

• The slower train has an older engine.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

We observe a moving object. When we observe the object moving more slowly, we know that it–

• will move in a new direction.

• has more gravity pulling on it.

• can’t go back to where it started.

• has less energy than it had before.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

A change in position or location

• Decrease

• Energy

• Movement

• Speed

To become more

• Decrease

• Movement

• Increase

• Energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

When does an object have no kinetic energy?

• When it's at rest.

• When it's moving very slowly.

• When the only force that's acting on it is gravity.

• When it has no electrical charge.

When does a yo-yo have the most potential energy?

• When it's at its highest point.

• When it's at its lowest point.

• When it's moving between its highest and lowest points.

• When it's moving at its top speed.

Tags

NGSS.MS-PS3-2

What do potential and kinetic energy have in common?

• They're both related to density.

• They're both unrelated to size.

• They're both related to volume.

• They're both related to motion.

Which type of energy increases when you compress a spring?

• elastic potential energy

• kinetic energy

• radiant energy

• sound energy

The faster an object moves, the ________ kinetic energy it has. 

• more

• less

• none of the above

• all of the above 

Tags

NGSS.MS-PS3-1

What is the formula to calculate speed?

• S = t/d

• S = d/t

• S = d x t

• S = t x d

Tags

NGSS.MS-PS3-1