Week 22 Homework physics

What are the units for a spring constant?

• N
• m
• N•m
• N/m

When energy in a system is transformed, what happens to the total amount of energy in the system?

• It increases.
• It decreases.
• It stays the same.
• It goes to zero.

The brakes on an automobile become hot when they are used continuously because:

• kinetic energy is being converted to thermal energy.
• potential energy is being converted to thermal energy.
• the friction of the brakes causes an increase in kinetic energy..
• the friction of the brakes causes an increase in potential energy.

Tags

NGSS.HS-PS3-4

Friction between two surfaces transforms energy of motion directly to:

• electric energy.
• thermal energy.
• chemical energy.
• nuclear energy.

Tags

NGSS.MS-PS3-5

While sitting next to a campfire, Kenai noticed several different forms of energy being transformed from the potential chemical energy of the wood. Which form of energy would she NOT see in the campfire?

• Heat
• Nuclear
• Light
• Sound

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

NGSS.HS-PS4-1

Which of these equations would you use to calculate GPE?

• GPE=mgh
• KE=.5mv^2
• m=GPE/gh
• h=GPE/mg

Tags

NGSS.HS-PS2-4

At what position will the KE=0?

• A
• B
• C

At what position will the GPE=0?

• A
• B
• C

At what position with the KE be the highest?

• A
• B
• C

Tags

NGSS.HS-PS3-2

At what position will the GPE be the highest?

• A
• B
• C

Tags

NGSS.HS-PS2-4