PE and KE Energy Review

What two factors determine how much kinetic energy an object has?

• position and mass

• speed and position

• speed and mass

• speed and surface area

__________ is the energy stored in an object due to its position.

• Potential energy

• Kinetic energy

• Thermal energy

• Entropy

Tags

NGSS.MS-PS3-2

The __________ is the SI unit of energy.

• watt

• joule

• volt

• ampere

What two factors determine how much gravitational potential energy is in an object?

• weight of the object and height above the ground

• weight and speed of the object

• shape of the object and its position relative to the ground

• shape and speed of the object

Tags

NGSS.MS-PS3-2

How much gravitational potential energy does a 75-kg diver have stepping off the edge of a 5-m platform?

 $mgh$  

(a)  

Tags

NGSS.HS-PS3-1

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?

 $\frac{1}{2}mv^2$  

(a)  

Tags

NGSS.HS-PS3-1

Which of the following statements about an apple falling from a tree is true?

• Its kinetic energy decreases and its potential energy increases.

• Its potential energy decreases and its kinetic energy increases.

• Its kinetic and potential energies remain constant.

• Its mechanical energy increases.

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

During energy transformations, energy is never __________.

• released as heat

• used to increase an object's potential energy

• completely transformed

• created or destroyed

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

As energy transformations occur within a system, the total energy of the system __________.

• increases

• decreases

• is transferred out of the system

• remains constant

Tags

NGSS.HS-PS3-4

A baseball is hit into the air with a bat. When does the baseball have the greatest gravitational potential energy?

• when it reaches its highest point

• when it leaves the bat

• when it hits the ground

• when the mechanical and kinetic energies of the baseball are equal

Tags

NGSS.HS-PS2-4