Unit 2 Practice Quiz: Energy, GPE, KE, and Work

In physics, work can be calculated by multiplying

• force times velocity.

• force times acceleration.

• force times distance.

• force times power.

What general kind of energy is stored up?

• kinetic energy.

• potential energy.

• thermal energy.

• electrical energy.

Tags

NGSS.MS-PS3-2

What is the formula for calculating the kinetic energy of a moving object?

• its mass multiplied by its velocity squared.

• one half times its mass times its speed squared.

• its mass multiplied by its acceleration.

• one half times its mass times its velocity.

Tags

NGSS.MS-PS3-1

William is riding his bicycle down the street. An object that has kinetic energy must be ...

• at rest.

• falling.

• moving.

• elevated.

Tags

NGSS.HS-PS3-2

A force of 15 Newtons moves a cart 5 meters. Calculate the work done.

• 75 Joules

• 60 Joules

• 45 Joules

• 90 Joules

Evelyn drags a crate 10 meters across a floor, doing 100 Joules of work. What force is Evelyn exerting?

• 10 Newtons

• 5 Newtons

• 15 Newtons

• 20 Newtons

Tags

NGSS.MS-PS2-2

One ball rolls and bumps into a stationary second ball. The second ball starts rolling. Why does the first ball slow down?

• Some of its energy is destroyed in the collision.

• Some of its kinetic energy is turned into potential energy.

• Some of its kinetic energy is transferred to the other ball.

• Because of unicorns and rainbows.

Tags

NGSS.MS-PS3-5

NGSS.MS-PS2-1

NGSS.MS-PS3-4

Lisa Simpson™ is holding a 2-kg apple at the top of the Springfield Elementary School roof. She is holding it at a height of 10 meters above the ground. How much gravitational potential energy does the apple have?

• 0 J

• 19.6 J

• 98 J

• 196 J

Tags

NGSS.MS-PS3-2

Lisa's apple is not experiencing friction or air resistance. How much kinetic energy will it have the moment before it hits the ground?

• 0 J

• 12.4 J

• 196 J

• 98 J

Answer explanation

GPE = m*g*h

GPE = 2 x 9.8 x 10

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What is the total energy of Lisa's apple?

• 0 J

• 98 J

• 196 J

• 9.8 J

Answer explanation

Energy cannot be created or destroyed so it has to be the same amount as what it started with

Tags

NGSS.MS-PS2-4