Work, Power, and Energy Review

Work is done when:

• a) Force is applied but there is no displacement.

• b) Force is applied and displacement occurs in the direction of the force.

• c) No force is applied.

• d) Displacement occurs in any direction.

If a force of 10 N moves an object 5 meters in the direction of the force, how much work is done?

• a) 15 J

• b) 50 J

• c) 5 J

• d) 10 J

Which of the following is the unit of work?

• a) Newton

• b) Joule

• c) Watt

• d) Meter

Tags

NGSS.HS-PS2-1

When force is used to move an object across a distance, this is called...

• effort

• power

• energy

• work

Which point has greatest kinetic energy?

• A
• B
• C
• none

Tags

NGSS.HS-PS3-2

NGSS.HS-PS2-3

How much kinetic energy does a moving object have if its mass is 100 kg and it is moving at a speed of 5 meters per second?

• 2,500 J
• 250 J
• 1,250 J
• 125,000 J

Tags

NGSS.MS-PS3-1

Potential energy depends on

• mass and height

• height and speed

• mass and speed

• height and force

Tags

NGSS.MS-PS2-4

Which is an example of potential energy?

• a roller coaster speeding down a hill
• the pulled back string on an archers's bow
• releasing the strings on a guitar
• an electric current lighting a light bulb

Tags

NGSS.MS-PS3-2

Which type of energy increases when you compress a spring?

• elastic potential energy
• kinetic energy
• radiant energy
• sound energy

gravitational potential energy is defined as

• the energy an object has due to its height above the ground
• the energy an object has due to its motion
• the energy a spring has due to its stretch
• the chemical energy stored in the molecules of atoms

Tags

NGSS.MS-PS3-2