Energy Variables

Maximum speed on the ramp occurs ---

• At the Top

• Halfway Down

• At the Bottom

Tags

NGSS.MS-PS3-1

The skater reaches maximum speed at the bottom because ---

• there is no Kinetic Energy.

• there is only Kinetic Energy.

• there is only Potential Energy.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

By increasing the drop height, ---

• the gravitational potential energy decreases

• the gravitational potential energy increases

• the elastic potential energy decreases

• the elastic potential energy increases

Tags

NGSS.MS-PS3-2

When maximum height increases, what should happen to the maximum speed?

• Increases

• Decreases

• No change

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

When increasing drop height, which process occurs?

• GPE decreases, KE at the bottom decreases which means the object's maximum speed decreases.

• GPE increases, KE has no change which means the object's maximum speed has no change.

• GPE has no change, but KE at the bottom also increases which means the object's maximum speed increases.

• GPE increases, but KE at the bottom also increases which means the object's maximum speed increases.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

A 650-kilogram roller coaster starts from rest at the top of at the first hill and glides down the track without friction. The vertical heights of the first, second and third hills are 90m, 60m and 30m, respectively. Neglect friction and air resistance.

Compare the kinetic energy of the roller coaster at the top of the second hill to its kinetic energy at the top of the third hill. Justify your comparison.

• The kinetic energy is the same on the top of the second and third hill.

• The kinetic energy is twice as much on the top of the second hill as the top of third hill.

• The kinetic energy is twice as much on the top of the third hill as the top of second hill.

• The kinetic energy is four times as much on the top of the third hill as the top of second hill.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-4

NGSS.MS-PS3-5

By increasing the spring compression, ---

• the gravitational potential energy decreases

• the gravitational potential energy increases

• the elastic potential energy decreases

• the elastic potential energy increases

Tags

NGSS.MS-PS3-2

When the maximum spring compression increases, the maximum speed--

• Increases

• Decreases

• No Change

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

When increasing spring compression, which process occurs?

• EPE decreases, KE decreases which means the object's maximum speed decreases.

• EPE increases, KE has no change which means the object's maximum speed has no change.

• EPE has no change, but KE has increases which means the object's maximum speed increases.

• EPE increases, KE has increases which means the object's maximum speed increases.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

A block of mass m is pushed to the left against a spring that is compressed a distance d from its equilibrium length. When the block is released, it reaches a maximum kinetic energy of KE₁. Next a block with mass 2m is pushed against an identical spring and compressed the same distance d. What is the maximum kinetic energy of the 2m block?

• 1/2 KE₁

• KE₁

• 2 KE₁

• 4 KE₁

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5