work power energy

Which does not illustrate kinetic energy?

• It is expressed in Joule.

• It depends upon the objects’ mass and speed.

• It is the energy an object possesses due to its motion.

• It depends upon the objects’ mass and objects’ height.

Which statement illustrates work done?

• A weightlifter holds a barbell above her head.

• A teacher applies a force to a wall and becomes exhausted.

• A rolling marble hits a note card and moves it across a table.

• A waiter carries a tray full of meals across a dining room at a constant speed.

A weightlifter holds a 100 kg barbell above her head. Is work done?

• Yes because there is a force applied to the barbell and the force causes a displacement of the barbell.

• Yes because there is an upward force applied to the barbell and the barbell moves vertically.

• No because no displacement occurred.

• No because there is no force applied.

Energy that is stored is called...

• Kinetic
• Potential 

Tags

NGSS.MS-PS3-2

The energy of movement is...? 

• Kinetic
• Potential

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

The SI unit of energy is?

• Joules
• Watts
• Newtons
• meters

The equation for POTENTIAL ENERGY is

• PE = mass x gravity x height

• PE = gravity x weight

• PE = height / work

• PE = work / time

Tags

NGSS.MS-PS3-2

The equation for KINETIC ENERGY is

• KE = mass x gravity

• KE = 1/2 height x speed

• KE = mass²

• KE = 1/2 mass x speed²

Tags

NGSS.HS-PS3-2

________________ is the rate at which work is done.

• Power

• Work

• Time

• Energy

The unit of power (aka Joule per second)

• Joule

• Minute

• Watt

• Pound