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COPY IGCSE Physics > Physics EoY F3 > Flashcards

Physics EoY F3 Flashcards

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1
Q

What is the formula for kinetic energy?

A

k.e = (mass x velocity squared)/2

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2
Q

What is the formula for gravitational potential energy?

A

g.p.e = mgh

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3
Q

What is the formula for work?

A

w = force X distance

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4
Q

What is the formula for power?

A

P = e/t

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5
Q

What is the formula for efficiency?

A

efficiency = useful energy out/total energy in

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6
Q

What is the formula for acceleration?

A

a = change in velocity/time

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7
Q

What is the formula for force?

A

F = ma

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8
Q

What is the formula for weight?

A

W = mass X g

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9
Q

What is the formula for momentum?

A

Momentum = mass X velocity

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10
Q

What is the formula for moment?

A

M = force X perpendicular distance from pivot

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11
Q

What is the formula for Hooke’s Law/spring extension?

A

Force = spring constant X extension

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12
Q

How do you calculate the resultant force?

A

bigger force - smaller force

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13
Q

What is terminal velocity?

A

The point at which a falling object will have its weight be equal to air resistance.

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14
Q

What are 2 factors that affect air resistance?

A

Velocity of the object| Surface area of the object

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15
Q

What happens when the velocity of an object increases?

A

The air resistance increases.

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16
Q

What do unbalanced forces cause?

A

Acceleration/change in motion.

17
Q

What is weight?

A

The effect of a gravitational field on a body with mass.

18
Q

What can forces do?

A
  • change size of body- change shape of body- change body’s motion
19
Q

What is the gradient of a speed-time graph?

A

Acceleration.

20
Q

What is the gradient of a distance-time graph?

A

Speed.

21
Q

How do you find distance in a speed-time graph?

A

Calculating the area under the graph.

22
Q

What is the centre of mass?

A

The average mass position of a body.

23
Q

What can the position of the centre of mass tell us?

A

The lower the centre of mass, the more stable the object.

24
Q

What is the difference between scalars and vectors?

A

Both have magnitude, but vectors have direction.

25
Q

What is GPE?

A

Energy stored in a gravitational field.

26
Q

What is power?

A

Power is the rate at which energy is transferred.

27
Q

What is work done?

A

Work done is the energy transferred to an object when a force is applied on it, causing it to displace itself.

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