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1

What does SUVAT stand for

S- Distance/displacement (m)

U- initial speed/velocity (m/s)

V- Final speed/velocity (m/s)

A- Acceleration (m/s²)

T- Time (Seconds)

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2

Equation for average speed

Average speed = total distance/total time

Total distance = total time x average speed

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3

Define scalar and vector

Scalar- physical quantity that has magnitude but no direction (speed, volume etc.)

Vector- Physical quantity that has both magnitude and direction (Displacement, velocity, acceleration)

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4

Equation for acceleration

Acceleration = (final velocity-initial velocity)/time

Velocity = acceleration x time

Time = (final velocity-initial velocity)/acceleration

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5

What does a distance-time graph show

y-axis = Distance

x-axis = time

Gradient = Speed

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6

What does a Velocity-time graph show

y-axis = velocity

x-axis = Time

Gradient = acceleration

Area under graph = distance travelled

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7

Equation for Kinetic Energy

Kinetic energy = 0.5 x mass x velocity²

KE = (1/2) x mv²

m = 2KE/v²

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8

Define Force

A force is a push or pull that acts upon an object as a result of that object's interactions with its surroundings

Measured in Newtons and is a vector quantity

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9

What does a free-body diagram show

Free body diagrams use arrows to show all of the __forces__ acting on an object.

The length of each arrow indicates the __magnitude__ of that force.

The direction of each arrow indicates the __direction__ of the force.

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10

Define resultant force

Resultant force is the overall force acting on an object, taking into account all the different forces acting on it

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11

What is Newton’s First Law

“An object will continue to stay at rest or move with uniform velocity unless a force acts upon it”

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12

Define Inertia

The tendency to resist a change in the state of motion

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13

What is Newton’s Second law

“The acceleration that the resultant force produces depends on the size of the resultant force and the inertia of the object”

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14

How to calculate resultant force

Force = mass x acceleration

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15

What happens to objects moving in a circular motion

An object moving in a circle at a constant speed is still accelerating even though the speed does not change.

Constantly changing direction so the velocity changes

A forced directed towards the centre of the circle acts on the object

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16

What does the size of air resistance on an object depend on

The size of the air resistance is dependent on the object's surface area and velocity

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17

Equation to calculate weight

Weight = mass x gravitational field strength

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18

Equation to calculate momentum

Momentum = Mass x velocity

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19

What is Newton’s Third Law

When two objects interact, the forces they exert on each other are equal and opposite

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20

What is the conservation of momentum principle

The total momentum before a collision is equal to the total momentum after the collision

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21

How to calculate work done

Work done = force x distance

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22

Equation for power using work done

Power = work done/time

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23

Difference between plastic and elastic deformation

Plastic deformation- Do not return to original shape after a force is applied

Elastic deformation- Return to original shape after a force is applied

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24

What is the extension of a spring

The difference between total length of the spring and the original length with no force applied

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25

What is Hooke’s Law

When an elastic object is stretched, the extension is proportional to the force applied to it

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26

Define Spring constant

The amount of force required to stretch or compress an object by either 1cm or 1m

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27

Equation for force using spring constant

Force = spring constant x extension

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28

equation for elastic potential energy

*Ee*=1/2 x *k x e*²

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29

What does a force extension graph show

y-axis = Force

x-axis = Extension

gradient = Spring constant

Area under = elastic potential energy

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30

How to calculate a moment

Moment = force x distance from pivot

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