Work Power and Energy

Which situation is work not done?

• lifting a 20 pound box off the floor

• holding a 20 pound box above the floor

• sliding a 20 pound box across the floor

• sliding a 20 pound box up an inclined plane

A battery converts what type of energy to another?

• sound to kinetic

• light to heat

• mechanical to electrical

• chemical to electrical

When an object is carried at a constant

velocity by a force,

• no work is done on the

  object.

• the work done is maximum on the

  object.

• the work is done minimum on the

  object.

• the work done is 100 % on the

  object.

Which of these items is not part of the law of conservation of energy?

• energy cannot be created

• energy cannot be destroyed

• energy can be transferred between forms

• energy is destroyed by friction

In which of these cases is work being done? 

• A student sleeps

• A student pushes a locked door that does not move

• a student carries his chair into another room

• A student sits on the carpet

Where is the kinetic energy of pendulum at its highest?

• at the top of the swing

• at the bottom of the swing

• at 1/4 of the swing

• at 3/4 of the swing

Tags

NGSS.MS-PS3-5

Bobby lifts a book to the second floor in 20 seconds. Carol lifts the same book to the second floor in 10 seconds. Who did more work?

• Bobby

• Carol

• They did the same amount of work

• Not enough information

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

• Height and mass

• Friction and movement

• Mass and Movement

• Height and Friction 

Tags

NGSS.MS-PS3-2

Work is:

• A transfer of energy by a force to move and object

• Something you get paid for

• Something you take home

• Makes you sweat

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

At which point is potential energy greatest

• W

• X

• Y

• Z

Tags

NGSS.MS-PS3-2