Energy, Electricity and Simple Machine Review

How does using a pulley to lift an object increase mechanical advantage?

• By increasing the mass of the object being lifted

• By decreasing the mass of the object being lifted

• By increasing the amount of force needed to lift the object

• By decreasing the amount of force needed to lift the object

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Jaelyn wants to move a heavy box up the stairs. Why should she use a simple machine when moving the box?

• A simple machine will reduce the distance needed to complete the work

• A simple machine will keep the box safer

• A simple machine will make the work take less time

• A simple machine will make the work easier

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

Which is the best example of a first-class lever?

• See-saw

• Wheelbarrow

• Scissors

• Playground merry-go-round

Which choice describes the energy the spring toy has in Diagram 1?

• A combination of potential energy, kinetic energy, and mechanical energy

• All potential energy

• All kinetic energy

• All mechanical energy

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

Which situation demonstrates energy being transferred from one system to another?

• A gardener pushing a lawnmower across a lawn

• A student wearing a backpack waiting for the bus

• A soccer ball resting on the field

• A couch sitting on the ramp

Tags

NGSS.MS-PS3-5

Which circuit is most likely able to conduct electricity?

• A

• B

• C

• D

Adam had a string of lights. The whole string of lights stopped glowing when one of the light bulbs burned out. What caused this to happen?

• The burned-out lightbulb caused a surge in the power source.

• The burned-out lightbulb opened the circuit.

• The burned-out lightbulb drained the power source.

• The burned-out lightbulb closed the circuit.

A toy car is placed at the top of a ramp and released. Which situation describes how the car's energy is transformed?

• The car has a large amount of kinetic energy at the top of the ramp, which is converted into chemical energy after the car is released.

• The car has a large amount of potential energy at the top of the ramp, which is converted into kinetic energy after the car is released.

• The car has a large amount of kinetic energy at the top of the ramp, which is converted into potential energy after the car is released.

• The car has a large amount of mechanical energy at the top of the ramp, which is converted into thermal energy after the car is released.

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

The diagram below shows a boy with his positions above the trampoline. Which best describes the energy the boy has at position 3 just before gravity begins to pull him back down?

• Applied

• Mechanical

• Potential

• Kinetic

Tags

NGSS.MS-PS3-5

Which position has the least amount of kinetic energy when a person is swinging a hammer?

• Position 4

• Position 3

• Position 2

• Position 1

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5