Energy, Work & Power (HPS)

Which of the following is NOT true about Potential Energy?

• An object's position affects its potential energy
• Potential energy is Stored energy
• Potential energy only occurs when an object is in motion
• All objects have potential energy

Tags

NGSS.MS-PS3-2

w = 500 Joules

t = 25 seconds

P = ???

• 0.05 W

• 20 W

• 12500 W

• 2000 W

A person weighing 600 N gets on an elevator. The elevator lifts the person 6 m in 10 seconds. How much power was used in lifting just the person?

• 360 W

• 60 W

• 3600 W

• 600 W

How much time is needed to produce 720 Joules of work if the task requires 90 W?

• 0.125 s

• 8 s

• 64800 s

• 80 s

Energy stored in the height of an object is called ___________ potential energy.

• Elastic
• Chemical
• Gravitational
• Nuclear

Tags

NGSS.MS-PS3-2

A hedgehog with a mass of 2kg runs at a speed of 0.5 m/s. Calculate the kinetic energy.

• 1.25 J

• 1.00 J

• 0.50 J

• 0.25 J

Calculate the kinetic energy when a man of mass 80 kg runs at a speed of 7 m/s

• 280 J
• 1,960 J
• 22,400 J
• 560 J

What type of energy includes both kinetic and potential energy?

• mechanical energy
• chemical energy
• heat energy
• sound energy

Tags

NGSS.MS-PS3-2

As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy? 

• Both the potential energy and kinetic energy decrease
• The potential energy decreases while the kinetic energy increases 
• The kinetic energy decreases while the potential energy increases 
• Bothe the potential energy and kinetic energy increase 

Tags

NGSS.MS-PS3-5

Roller coasters slow down because their energy disappears.  

• True 
• False

Tags

NGSS.MS-PS3-5