Turning Forces And Levers And Gears

Question 1

What is another name for a turning effect of a force?

Answer 1

A moment

Question 2

A force can make an object turn ______________ or ____________________

Answer 2

Clockwise

Anti-clockwise

Question 3

The turning effect of a force depends on the ___________ from the ________

Answer 3

Distance

Pivot

Question 4

What 3 things do levers need?

Answer 4

Fulcrum
Effort
Load

Question 5

Describe a Class 1 lever

Answer 5

The load and the effort are on the opposite sides of the fulcrum

Question 6

What is an alternative name for the fulcrum?

Answer 6

Pivot

Question 7

Describe a Class 2 lever

Answer 7

The load is between the effort and the fulcrum

Question 8

Describe a Class 3 lever

Answer 8

The effort is between the load and the fulcrum

Question 9

Give an example of a Class 1 lever

Answer 9

See-saw
Scissors
Crowbar

Question 10

Give an example of a Class 2 lever

Answer 10

Wheelbarrow

Nutcracker

Question 11

Give an example of a Class 3 lever

Answer 11

Tweezer

Human jaw

Question 12

When a lever acts as a ________ _____________ it may seem that we’re getting more __________ than we started with

Answer 12

Force multiplier

Energy

Question 13

The work done by the ___________ is the same as the work done by the __________

Answer 13

Effort

Load

Question 14

To move a heavy object a short distance, a ________ force moves the lever through a ___________ distance

Answer 14

Small

Longer

Question 15

When 2 or more gears are connected the gear ratio will determine how _______ each cog spins and the ___________ required

Answer 15

Fast

Force

Question 16

What is a gear ratio?

Answer 16

The relative number of teeth on each cog

Question 17

When a gear is turned directly by an adjacent cog it will rotate in the _______________ direction

Answer 17

Opposite