Post exercise quiz: Work, power, energy

A ball is released from spring that pushes a 0.5kg ball over a 2cm distance and accelerates the ball to 2m/s² every time. If the ball is sprung toward a ramp of 45⁰ and then again at a ramp of 20⁰, how high up will the ball travel above the horizon on each ramp relative to each other?

• higher on 45⁰ ramp

• higher on 20⁰ ramp

• the same height

• not enough information to answer

A ball is released from a spring that pushes a 0.5kg ball over a 2cm distance and accelerates the ball to 2m/s² every time. If the ball is sprung toward a ramp of 45⁰ and then again at a ramp of 20⁰, how will the displacement up each ramp compare?

• displacement will be the same

• the displacement will be greater on the 20⁰ ramp

• the displacement will be greater on the 45⁰ ramp

• the displacement will be equal but it will travel higher on the 45⁰ ramp

A ball is released from spring that pushes a 0.5kg ball over a 2cm distance and accelerates the ball to 2m/s² every time. If the ball is sprung toward a ramp of 45⁰ and then again at a ramp of 20⁰, how does the potential energy of the ball on the ramps (at the ball's highest point) compare to each other?

• greater on 20⁰ ramp

• greater on the 45⁰ ramp

• the same on each ramp

• not enough information to answer

A ball is released from a spring that pushes a 0.5kg ball over a 2cm distance and accelerates the ball to 2m/s² every time. If the ball is sprung toward a ramp of 45⁰ and then again at a ramp of 20⁰, how does the acceleration change as the ball moves upward compare on each ramp?

• acceleration changes faster on 45^o ramp

• acceleration changes faster on 20^o ramp

• acceleration change is same on each ramp

• can't answer because we don't know the time it takes for ball to stop rolling.

A ball is released from a spring that pushes a 0.5kg ball over a 2cm distance and accelerates the ball to 2m/s² every time.

The ball is sprung toward a ramp of 45⁰ and then again at a ramp of 20⁰. How much work is done on the ball for each ramp?

• 20 J

• .02 J

• .00014 J

• .007 J

A ball is released from a spring that pushes a 0.5kg ball over a 2cm distance and accelerates the ball to 2m/s² every time. If the ball is sprung toward a ramp of 45⁰ and then again at a ramp of 20⁰. When the ball reaches its' highest point on the ramp, which system has the greatest potential energy?

• the 20^o ramp system

• the 45^o ramp system

• neither system

• the potential energy is not predictable

If 150 Joules of work is needed to move a box 10 meters, what force was used? 

• 1500 N
• 15 N
• 1.5 N
• 150 N

Tags

NGSS.HS-PS2-1

If 68 Joules were necessary to move a 4 Newton crate, how far was the crate moved?

• 272 m
• 17 m
• 4.05 m
• 272 cm 

Tags

NGSS.MS-PS3-4

Gravitational potential energy depends on the ________ and ________ of the object. 

• Height and mass
• Friction and movement
• Mass and Movement
• Height and Friction 

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-2

What is the formula for calculating the total amount of mechanical energy?

• ME = KE + PE
• KE = ME + PE
• PE = KE + ME
• ME = 1/2 mv²

Tags

NGSS.MS-PS3-5