Energy 8

What is a mechanical advantage?

• A pulley system

• The force applied

• The advantage gained by use of a mechanism

• A simple machine

A joule is...

(select 2 answers)

• 1 Newton of force applied over a 1 meter distance

• found in food

• a unit of force

• a unit of energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Work done is measured in

• Newtons

• Joules

• Distance

• Newtons per metre squared

Tags

NGSS.HS-PS2-1

Force =

• work x distance

• work ÷ distance

• distance ÷ work

Work =

• force x distance

• force ÷ distance

• distance ÷ force

The INPUT force in a pulley...

• is the load lifted

• is the force applied to pull the rope

The Law of Conservation of Energy means that...

(select 2 answers)

• energy can not be created or destroyed

• work done must be equal

• the displacement (distance moved) must be equal

• the input and output forces must be equal

Tags

NGSS.MS-PS3-5

20N of force were applied to a pulley rope to move a load of 100N 50cm. How many wheels were on the pulley?

• 2

• 3

• 4

• 5

20N of force were applied to a pulley rope to move a load of 100N 50cm. How far was the rope pulled?

• 1 metre

• 150cm

• 200cm

• 2.5m

Tags

NGSS.MS-PS2-2

A lever is a force multiplier. This means

• you must apply more force to make it work

• it will increase the effect of the force

• it will decrease the effect of the force