Energy Review: KE, GPE, Work, and Power

The best definition of energy is (a)  

• the ability to move
• the speed an object travels
• the ability to do work
• the vibrations of atoms

Tags

NGSS.MS-PS3-5

The SI unit(s) for energy is (a)   .

• Joules or kilojoules
• grams or kilograms
• watts or kilowatts
• newtons

You can calculate kinetic energy (KE) by using the equation (a)   .

• KE = mgh
• KE = 1/2 m v2
• KE = 1/2 (9.8)h
• KE = dst

You can calculate gravitational potential energy (GPE) by using the equation (a)   .

• GPE = 1/2mh
• GPE = 1/2gh
• GPE = mgh
• GPE = 1/2 m v2

The KE of an object increases as its (a)   increases.

• velocity
• temperature
• gravitational constant
• height

Tags

NGSS.MS-PS3-1

How could you increase the GPE of a ball without raising it higher?

• change the shape of the ball
• change the volume of the ball
• change the mass of the ball
• insult the ball by calling it a triangle

Elastic and gravitational examples of what category of energy? (a)  

• kinetic energy
• immediate energy
• temporary energy
• potential energy

Tags

NGSS.MS-PS3-2

The type of energy found in fuels and food is (a)  

• chemical potential energy
• elastic potential energy
• radiant energy
• kinetic energy

According to the law of conservation of energy, the total amount of energy in the universe (a)   .

• increases over time
• decreases over time
• changes constantly
• remains constant

On the way down, the KE of a coconut falling from a tree (a)  

• increases
• does not exist
• decreases
• stays the same

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5