Conservation of Energy Work

At which point(s) on the roller coaster is the gravitational potential energy at its maximum?

• A
• B
• C
• D

At which point(s) on the roller coaster is the kinetic energy at its maximum?

• A
• B
• C
• D

1. A ball has a 17 J of kinetic energy and its mechanical energy is 25 J. If the ball has a mass of 3.2 kg, what is its height above the ground?

• 0.25 m

• 0.52 m

• 5.2 m

• 25 m

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

What is mechanical energy?

• It is what metal creates when heated.
• All potential and kinetic energy in a system.
• It is motion of all matter.
• Energy of momentum.

Tags

NGSS.HS-PS3-2

What does the Law of Conservation of Energy state?

• Energy cannot be created or destroyed
• Nothing can exchange energy
• Energy will increase over time.
• Energy will decrease over time.

Tags

NGSS.HS-PS3-3

NGSS.HS-PS3-4

When something is dropped, what type of energy transfer takes place?

• Kinetic to Potential

• Gravitational Potential to Kinetic

• Electrical to Chemical

• Heat to Nuclear

Roller coasters slow down because their energy disappears.  

• True 
• False

Tags

NGSS.MS-PS3-5

As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy? 

• The PE and KE increase and decrease together
• The PE decreases while the KE increases 
• Impossible to know without knowing the mass  

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

A 40 kg crate is picked up by a crane to a height of 50m. The crate falls. What is the velocity of the crate just before it hits the ground?

• 2000 Joules

• 19,600 Joules

• 1000 m/s

• 31.62 m/s

Tags

NGSS.HS-PS2-1

The Law of Conservation of Energy states that energy is never __________________ or _________________, only transferred.

• created, destroyed

• created, subtracted

• added, subtracted

• destroyed, subtracted