Law of Conservation of Energy

45 J of work were done on the object that moved 5 meters. How much force was applied to the object?

• 8 N

• 225 N

• 9 N

• 0 N

What is the ΔKE of a baseball hit with a force of 6000 N that travels 120 m across the field?

• 6000J

• 43560000J

• 720000J

• 50J

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

NGSS.MS-PS2-2

When my velocity triples, my kinetic energy increases by ______ times.

• 9
•  3 
• 1.5
• 4.5

Tags

NGSS.MS-PS3-1

True or false: the net work done on a body is equal to its change in kinetic energy.

• True
• False

Tags

NGSS.MS-PS3-4

What does work equal when the final change in kinetic energy equals 20,000 J?

• 0J

• 2041J

• 20,000J

• 4164931J

Tags

NGSS.MS-PS3-5

What kind(s) of energy is(are) in a person climbing a ladder?

• Potential

• Kinetic

• Both

• Need the mass of the person to determine.

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-1

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

• The PE and the KE decrease and increase together.

Tags

NGSS.MS-PS3-5

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

• Need the mass of the object to determine if energy is conserved.

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

If two marbles are rolled down a ramp from some height towards a container the _______ marble will move the container farther because it possess more _________ energy as it approaches the end of the ramp.

• heavier, kinetic

• heavier, potential

• lighter, kinetic

• lighter, potential

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-1

The rollercoaster has both PE and KE, but where will it have more PE than KE?

• 1

• 2

• 3

• 4

• 5

Tags

NGSS.MS-PS3-2