Mechanical Energy and Work

How much work is done when 114 W of power is used over 0.62 s?

• 70.68 J

• 183.87 J

• 57.62 J

• No work is done.

An 80 N rope tension force is used to slowly pull a wagon 50 m up a hill. Calculate the work done by the rope if it pulls parallel to the hill

• -4000 J

• 4000 J

Tags

NGSS.MS-PS3-4

How high up is a 3200-kg plane if it has 960000 J of potential energy?

• 10 m

• 30 m

• 307200000 m

• 300 m

What does the Law of Conservation of Energy state?

• Energy can be created but not destroyed.

• Energy can be created and destroyed.

• Energy cannot be created but can be destroyed

• Energy cannot be created or destroyed.

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

The sum of kinetic energy and potential energy within a system.

• nuclear

• electrical

• mechanical

• chemical

Tags

NGSS.MS-PS3-4

At which point is potential energy greatest?

• W

• X

• Y

• Z

Tags

NGSS.MS-PS3-2

The Ability to do work

• Soil 

• Energy 

• Matter

• Math

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What has to be true about an object for it to have kinetic energy?

• it must be moving

• it must be elevated

• it must be experiencing a net force

• it must be accelerating

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

The faster an object moves, the ________ kinetic energy it has. 

• more

• less

• none of the above

• same

Tags

NGSS.MS-PS3-1

When a pendulum swings, at which point is kinetic energy highest?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS3-1