Forces

Question 1

Acts perpendicular to the surface
Is equal and opposite to the force of the object pushing on the surface

Answer 1

Normal reaction force

Question 2

Applies in fluids
Affected by the objects shape speed and the fluid it is travelling in

Answer 2

Air resistance

Question 3

Occurs when mass is pushed out the back of something
Like letting out the air in a balloon

Answer 3

Thrust

Question 4

Acts in strings chains and cables when they are stretched
Acts parallel to the string

Answer 4

Tension

Question 5

Keeps things afloat
Can only occur in fluids
Equal to the weight of the fluid the object displaces

Answer 5

Upthrust

Question 6

Pulls two opposite poles together and pushes two like poles apart.
- the force increases as distance between the poles decreases

Answer 6

Magnetic force

Question 7

The force required to stretch or compress a spring
- The stretching force is directly proportional to the extension

Answer 7

Elastic/spring force

Question 8

The force produced due to the flow of a fluid over an aerodynamic surface
For example it keeps things in the air

Answer 8

Lift

Question 9

Pulls two opposite charges together and pushes two like charges apart.
- the force increases as distance between the charges decreases

Answer 9

Electrostatic force

Question 10

acts in the opposite direction
- can be reduced if surfaces are smoother

Answer 10

Friction

Question 11

a push or a pull

Answer 11

Applied force

Question 12

when masses are attracted to each other

Answer 12

Gravitational force

Question 13

normal reaction force

Answer 13

Acts perpendicular to the surface
Is equal and opposite to the force of the object pushing on the surface

Question 14

applied force

Answer 14

a push or a pull

Question 15

gravitational force

Answer 15

when masses are attracted to each other

Question 16

friction

Answer 16

acts in the opposite direction
- can be reduced if surfaces are smoother

Question 17

air resistance

Answer 17

Applies in fluids
Affected by the objects shape speed and the fluid it is travelling in

Question 18

spring/elastic force

Answer 18

The force required to stretch or compress a spring
- The stretching force is directly proportional to the extension

Question 19

tension

Answer 19

Acts in strings chains and cables when they are stretched
Acts parallel to the string

Question 20

thrust

Answer 20

Occurs when mass is pushed out the back of something
Like letting out the air in a balloon

Question 21

up-thrust

Answer 21

Keeps things afloat
Can only occur in fluids
Equal to the weight of the fluid the object displaces

Question 22

lift

Answer 22

The force produced due to the flow of a fluid over an aerodynamic surface
For example it keeps things in the air

Question 23

magnetic

Answer 23

Pulls two opposite poles together and pushes two like poles apart.
- the force increases as distance between the poles decreases

Question 24

electrostatic

Answer 24

Pulls two opposite charges together and pushes two like charges apart.
- the force increases as distance between the charges decreases

Question 25

Name vector quantities

Answer 25

Force
Displacement
Acceleration
Velocity

Question 26

Name scalar quantities

Answer 26

Time
Distance
Temperature
Speed
Mass

Question 27

Momentum =

Answer 27

Mass x velocity