Conservation of Energy

At which point(s) on the roller coaster is the gravitational potential energy at its maximum?

• A
• B
• C
• D

Tags

NGSS.MS-PS3-2

At which point(s) on the roller coaster is the kinetic energy at its maximum?

• A
• B
• C
• D

Tags

NGSS.MS-PS3-1

Work is equal to...

SELECT ALL THAT APPLY!

• KE + PE

• Change in energy

• mg

• FdcosΘ

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

Gravitational potential energy depends on the ________ and ________ of the object. 

• Height and mass

• Friction and movement

• Mass and Movement

• Height and Friction 

Tags

NGSS.MS-PS2-4

A girl weighs 400 N. She runs up a flight of stairs of height 5 m in 4 seconds. Her power is:

• 320 W

• 400 W

• 500 W

• 2 000 W

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

The Law of Conservation of Energy states that total amount of energy in a closed, isolated system will always...

• stay the same

• increase

• decrease

• cannot be determined

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

In order for work to be done, what MUST be true?

• Force acts in the same dimension as the distance traveled.

• Force and distance are in opposite dimensions

• Force is greater than distance.

• Distance is greater than force.

Which of the following is an example of work being done?

• Teacher sitting in a chair

• Keys hanging from a key chain

• A man pushing a wall

• A ball being rolled across the floor

Tags

NGSS.MS-PS3-5

Calculate the PE of a 2 kg cat perched 10 meters above the ground.

• 20J

• 200J

• 2.04J

• 200W

Tags

NGSS.MS-PS3-2

Two equal mass marbles are at the top of a frictionless ramp. One marble falls to the ground off the back while the other slides down the ramp. What is true about the marbles when they reach the ground?

• The marble that rolled down the ramp is moving faster than the marble that fell.

• The marble that fell down the back of the ramp is moving faster than the marble that rolled.

• The marble that rolled down the ramp is not moving when it reaches the ground.

• The two marbles are moving with the same speed.

Tags

NGSS.MS-PS3-5

NGSS.MS-PS2-4

NGSS.MS-PS2-2