P5

Question 1

Types of quantities

And examples

Answer 1

Scalar- just a number
e.g. mass, distance, speed

Vector- number and direction
e.g. weight, velocity, acceleration, force

Question 2

Resultant force

Answer 2

is the overall force on a point or object

Question 3

Equation for weight

Answer 3

W= M x G

W= Weight (N)
M= Mass (Kg)
G= Gravity (N/Kg)

Question 4

Equation for work

Answer 4

W= F x S

W= Work (J)
F= Force (N)
S= Distance (M)

Question 5

1J= ?Nm

Answer 5

1Nm

Question 6

Hooke’s law

Answer 6

F = K x E

F= Force (N)
K= Spring Constant (N/M)
E= Extension (M)

Question 7

Kinetic energy equation

Answer 7

Ek= 1/2 x M x V²

Ek= Kinetic energy (J)
M= Mass (Kg)
V= Velocity (m/s)

Question 8

Liquids and Gases

Which is compressible which is incompressible?

Answer 8

Compressible= gas
Incompressible= liquid

Question 9

Pressure equation

Answer 9

P= F/A

P= Pressure (N/m)
F= Force (N)
A= Area (M²)

Question 10

Distance equation

Answer 10

S= V x T

S= Distance (M)
V= Speed (m/s)
T= Time (S)

Question 11

How to find the distance travelled through a graph?

Answer 11

Area under the graph

Question 12

Acceleration equation

Answer 12

A= ΔV/T

A= Acceleration (m/s²)
ΔV= Change in velocity (m/s)
T= Time (s)

Question 13

Final velocity equation

Answer 13

V²-U² = 2 x A x S

V²= final velocity (m/s)
U²= initial velocity 
A= acceleration (m/s²)
S= distance (m)

Question 14

What is inertia?

Answer 14

An object that is in motion will remain in motion, unless acted on by an outside force

Question 15

The law of conservation of energy?

Answer 15

Energy is never created or destroyed it is only turned into something else

Question 16

Newtons 3rd law

Answer 16

For every action there is an equal and opposite reaction

Question 17

Newtons 1st law

Answer 17

an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.

Question 18

Newtons 2nd law

Answer 18

The acceleration of an object is directly proportional to the magnitude of the net force.

Question 19

Force equation

Answer 19

F = M x A

F= force (n)
M= mass (kg)
A= acceleration (m/s²)

Question 20

Stopping distance = …

Answer 20

Thinking distance + breaking distance

Question 21

Factors effecting thinking distance

Answer 21

• drink
• drugs
• tiredness

Question 22

Factors effecting breaking distance

Answer 22

• condition of tyres
• condition of road
• weight of car

Question 23

Momentum equation

Answer 23

P = M x V

P= momentum (kg m/s)
M= mass (kg)
V= velocity (m/s)

Question 24

The law of conservation of momentum

Answer 24

Momentum is always conserved

momentum before = momentum afterwards

Question 25

Forces can be…

Answer 25

Contact= when two objects have to be touching for a force to act. eg. friction, air resistance, tension etc.

Non contact= if the objects do not need to be touching for the force to act. eg. gravitational force, magnetic force etc.