Energy and Work Review

What is the best definition for Energy?

• The capacity (or ability) to do work

• How far things (like rocks) are able to fall

• The ability to come to a stop

• How fast something burns

Tags

NGSS.MS-PS3-5

What variable is important for how much Potential Energy an object has?

• Force

• Velocity

• Height

• Spring Constant

Tags

NGSS.MS-PS3-2

What is the unit for Work?

• m/s

• Power

• Watts

• Joules

If two people lift a boulder of the same weight, to the same height, and person "A" does it in 3 seconds, while person "B" does it in 4 seconds. Who did more Work?

• Person A

• Person B

• Both did the same amount of Work

Tags

NGSS.HS-PS3-2

If two people lift a boulder of the same weight, to the same height, and person "A" does it in 3 seconds, while person "B" does it in 4 seconds. Who used more Power?

• Person A

• Person B

• Both did the same amount of Work

Simple machines are used to do which of the following?

• To divide the amount of work needed to complete a task

• Multiply force or change the direction of force

• To create small amounts of energy

• To reduce the distance needed to travel between objects

If you go down a roller coaster that has friction, your Potential Energy will transform to what type(s) of Energy?

• Thermal + Kinetic Energy

• Potential Energy + Kinetic Energy

• Elastic Energy

• Kinetic Energy

Tags

NGSS.MS-PS3-5

You do 1,200 J of Work to raise a 100 N weight up against gravity. How high up did it go?

• 1,200 m

• 120 m

• 12,000 m

• 12 m

Tags

NGSS.MS-PS3-2

When someone jumps into a pool from a great height, where does most of their potential energy go after they come to rest in the water?

• The pool gains potential energy

• The pool gains thermal energy

• The pool gains elastic energy

• The person gains kinetic energy

Tags

NGSS.MS-PS3-5

NGSS.MS-PS1-4

Which energy type is the easiest to create from nothing?

• Kinetic

• Potential

• You can't create energy from nothing

• Thermal