Conservation of Energy

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

• A

• B

• C

• D

In diagram 2, if the mass of the car is 600 kg, what is the change in potential energy from point A to point B?

• 411,600 J
• 294,000
• 176,400 J
• 117,600 J

Tags

NGSS.HS-PS3-1

In diagram 2, if the 600 kg cart is initially at rest, what is its velocity at point B?

• 19.8 m/s
• 15.0 m/s
• 10.3 m/s
• 3.8 m/s

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS2-2

The velocity of a pendulum bob is 0.74 m/s at its equilibrium point.  If the pendulum bob has a mass of 14.3 g, what is the height (h) as indicated in the diagram?

• 0.027 m
• 0.037 m
• 1.35 m
• 2.75 m

The spring in the diagram below is compressed 2.1 cm.  What is the velocity of the 6.3 g marble as it is launched if the force constant, k, is 158 N/m?

• 2.41 m/s
• 4.21 m/s
• 3.32 m/s
• 1.18 m/s

Tags

NGSS.HS-PS3-1

NGSS.HS-PS2-1

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?

• 0.26 m

• 0.52 m

• 5.2 m

• 25 m

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

NGSS.MS-PS2-4

Food has _______ potential energy that our bodies transform into kinetic energy.

• Elastic
• Nuclear 
• Gravitational
• Chemical

Tags

NGSS.MS-LS1-7

According to the Law of Conservation of energy, the amount of energy before and after a reaction must be the same. Which statement below is true?

• The total amount of energy is conserved
• The total amount of energy is less after a reaction
• The total amount of energy is more after a reaction

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

NGSS.HS-PS1-7

During photosynthesis, what type of energy transfer takes place?

• Heat -> Chemical Potential
• Chemical Potential -> Light
• Light -> Chemical Potential
• Heat -> Light

Tags

NGSS.MS-LS1-6

The Law of Conservation of Energy states:

• Energy can created or destroyed but not transformed 
• Energy cannot be created or destroyed, it can only transformed
• Energy can't be created, destroyed or transformed