Energy Work Power

A young man exerted a force of 9,000 newtons on a stalled car but was unable to move it.  How much work was done?

• 9,000 J

• 0 J= No work

How much power is used if a force of 35 newtons is used to push a box a distance of 10 meters in 5 seconds?

• 70 watts

• 1750 watts

What is the power of a kitchen blender if it can perform 3,750 joules of work in 15 seconds?

• 56, 250 watts

• 250 watts

At which point is kinetic energy greatest? 

• W

• X

• Y

• Z

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

_____________ is the rate of doing work.

• Conservation of energy

• Joules

• Energy

• Power

A diver just before she dives off the 30m platform.

• Potential

• Kinetic

Tags

NGSS.MS-PS3-2

A stretched object, such as a rubber band, has _____________
potential energy.

• electrical

• gravitational

• kinetic

• elastic

When does an object have no kinetic energy?

• When it's at rest.

• When it's moving very slowly.

• When the only force that's acting on it is gravity.

• When it has no electrical charge.

Tags

NGSS.MS-PS3-1

A book is sitting on a table. Which of the following actions would add to its potential energy?

• Sliding it across the table

• Opening it to the middle

• Dropping it on the floor

• Lifting it to a high shelf

Tags

NGSS.MS-PS3-2

Which of the following examples best demonstrates kinetic energy?

• A brick lying on the ground

• A kite flying across the sky

• A television sitting on a table

• A curtain hanging in the window

Tags

NGSS.MS-PS3-1