Force, Moments, Work And Power

Question 1

Forces are measured in

Answer 1

Newtons

Question 2

Push

Answer 2

Changes the velocity of an object

Question 3

Weight

Answer 3

Moves objects towards the ground

Question 4

Magnetic

Answer 4

Causes magnetic material to move

Question 5

A force

Answer 5

Is anything which causes an object to change its velocity

Question 6

Electric

Answer 6

Causes charged particles to move

Question 7

To measure force we use a

Answer 7

Newton meter also called a spring balance

Question 7

Forces always occur in pairs

Answer 7

For every force there is an equal and opposite force

Question 8

Friction

Answer 8

Slows down moving objects

Question 10

High friction

Answer 10

Sand paper, Car types and rough soles shoes

Question 11

Low friction

Answer 11

Wet soap, ice and glass

Question 12

Lubricant

Answer 12

Is anything that reduces friction

Question 13

What would happen to our weight if we were on the Moon?

Answer 13

As Gravity is less on the Moon than on Earth , we would weigh less.

Our mass always stays the same, but our weight changes depending on the gravity that is acting on us.

Question 14

A lever

Answer 14

Is a rigid body which is free to turn about a fixed point called the FULCRUM

Question 15

Moment

Answer 15

The turning effect of a force (force x perpendicular distance from the force to the fulcrum)

Question 16

M

Answer 16

= Fd

Question 17

The law of the lever

Answer 17

When a lever is balanced the clockwise and anti-clockwise moments are equal