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AQA Physics Paper 2 > P5 Forces and Motion > Flashcards

P5 Forces and Motion Flashcards

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1
Q

What is a contact force?

A

When objects physically touch for example air resistance, tension and friction.

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2
Q

What are non-contact forces?

A

When object do not physically touch. E.g. magnetic and gravitational.

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3
Q

What are scalars?

A

A quantity that only has magnitude (size).

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4
Q

What are vectors?

A

A quantity that has magnitude (size) and direction.

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5
Q

What is the word equation for weight?

A

weight (N) = mass x gravitation field strength (9.8N/kg)

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6
Q

What is Hooke’s Law?

A

Force and extension are directly proportional.

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7
Q

What is the word equation for force?

A

Force = Spring constant x extension

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8
Q

What is moment?

A

Moment is a turning force.

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9
Q

What is the word equation for moment?

A

Moment = force x distance from pivot.

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10
Q

What is the principal of moments?

A

sum of clockwise moments = sum of anticlockwise moments.

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11
Q

What can be used to increase moments?

A

Gears.

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12
Q

What is the equation for pressure?

A

Pressure = force / area

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13
Q

What is the other equation for pressure?

A

Pressure = height x density x gravitational field strength.

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14
Q

What is the equation for speed or velocity?

A

Speed/velocity = distance/displacement / time

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15
Q

What is the equation for acceleration?

A

Acceleration = change in velocity / time

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16
Q

How can you find displacement from a graph?

A

Calculate the area under the graph.

17
Q

What is SUVAT?

A

Displacement, Initial velocity, Final velocity, Acceleration and Time.

18
Q

What is Newton’s First Law?

A

No resultant force acts on an object, its motion will be constant.

19
Q

What is Inertia?

A

the tendency for an object’s motion to stay constant if no force.

20
Q

What is Newton’s Second Law?

A

Force = mass x acceleration

21
Q

What is Newton’s Third Law?

A

For every action of force, there is an equal and opposite reaction force.

22
Q

What is the equation for stopping distance?

A

Stopping distance = thinking distance + breaking distance

23
Q

What affects thinking time?

A

Drugs, alcohol, tiredness and distractions.

24
Q

What affects breaking distance?

A

Road conditions, tyre conditions, brake conditions, speed, weather conditions.

25
Q

What is the equation for momentum?

A

Momentum = mass x velocity

26
Q

What happens to momentum in a collision?

A

It is always conserved.

27
Q

What can increase collision time?

A

Seat belts, air bags and crumple zones.

AQA Physics Paper 2 (3 decks)

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