Physics Power

A roller coaster goes over a 10m high hill at 20m/s. What kind of energy does the roller coaster have?

• Potential

• Kinetic

• Both

• Neither

Tags

NGSS.MS-PS3-5

A car engine provided 100 J in 2 seconds. Calculate the power of the engine.

• 200 W

• 50 J

• 50 W

• 200 J

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Lisa took 12 seconds to walk up a spiral stair to reach a height of 9 m while carrying a trophy with weight of 4 N. Calculate her power.

• 36 W

• 30 W

• 3 W

• 360 W

Jennie walked up a hill and did a work of 300 J in 15 seconds. Calculate her power.

• 20 W

• 4500 W

• 200 W

• 45000 W

Formula for power is Power = ​ (a)  

• ma

• mg

• Pt

The unit of work was named after...

• James Watt

• Isaac Newton

• James Joule

• Renee Descartes

The unit of power was named after...

• James Watt

• Isaac Newton

• James Joule

• Renee Descartes

Power is a measure of how much ______ can be done in a set amount of ______.

• Work, Time

• Work, Energy

• Energy, Force

• Force, Work

Work is a measure of the energy needed to apply a force across a _______.

• time

• distance

• gravity

• object

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

An object has a weight of 200 N and is moved 3 meters.  How much work is done?

• 66.7 J

• 600 J

• 203 J

• 0.015 J