P.5.1.2

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

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

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.HS-PS3-2

Why does the total amount of mechanical energy stay constant in a system?

• energy is not created or destroyed
• energy leaves
• energy enters
• energy is not converted from one form into another

A 10.0 kg box is accelerated from 2.0 m/s to 4.0 m/s. What is the amount of work needed to accelerate the box?

• 50 J

• 60 J

• 20 J

• 45 J

Tags

NGSS.HS-PS2-1

NGSS.HS-PS3-1

A 12 kg book is pushed from rest to a final velocity of 10 m/s. The book travels 6 m. How much force was the book pushed with?

• 600 N

• 100 N

• 200 N

• 1200 N

Tags

NGSS.HS-PS2-1

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

• A
• B
• C
• D

The total energy in an isolated system can be increased.

• True
• False

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

• A
• B
• C
• D

Tags

NGSS.HS-PS3-2

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.HS-PS3-1

A ball is pushed and rolls across a level floor at constant velocity. The system is the ball and the floor. What are the initial and final energy types?

• Initial: Ug (gravitational), KE; Final: KE

• Initial: KE; Final KE

• Initial: spring/elastic potential energy, KE; Final: KE

• Initial: Work from push; Final: KE