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GCSE Higher Tier Physics > Important Equations > Flashcards

Important Equations Flashcards

1
Q

What is mass?

A

A measure of the amount of (matter) substance in an object. In grams or kilograms.

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2
Q

What is weight?

A

The force of gravity acting on an object.

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3
Q

What is friction?

A

A force which opposes motion.

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4
Q

What is density?

A

The mass of 1 cm³ of the material.

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5
Q

What does Hooke’s Law state?

A

The extension of a spring is directly proportional to the applied load provided the limit of proportionality is not exceeded.

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6
Q

Define pressure?

A

The force of an object divided by the area of the object in contact with a surface.
P=f/a

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7
Q

What is the centre of gravity?

A

The point on an object where weight appears to act.

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8
Q

What is the centre of mass?

A

The point on an object where all the mass appears to be concentrated.

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9
Q

What is a moment?

A

The product of the force and the perpendicular distance from the pivot to the line of action of the force.

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10
Q

What is the principle of moments?

A

When an object is in equilibrium, the sum of the anticlockwise moments equals the sum of the clockwise moments (ACM=CM) about the same point.

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11
Q

Fill in the blank: Weight = _______ X gravity.

A

[mass]

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12
Q

Fill in the blank: Density = _______ ÷ volume.

A

[mass]

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13
Q

Fill in the blank: Force = _______ X extension.

A

[spring constant]

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14
Q

Fill in the blank: Pressure = _______ ÷ area.

A

[force]

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15
Q

Fill in the blank: Moment = _______ X perpendicular distance from pivot.

A

[force]

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16
Q

True or False: Anticlockwise moments equal Clockwise moments in equilibrium.

A

True

17
Q

What is a scalar quantity?

A

A scalar quantity has magnitude only.

Examples include temperature and mass.

18
Q

What is a vector quantity?

A

A vector quantity has both magnitude and direction.

Examples include velocity and force.

19
Q

Define acceleration?

A

The rate of change of velocity.

20
Q

What does resultant force refer to?

A

Unbalanced force.

21
Q

State Newton’s First Law of Motion.

A

An object stays at rest or continues to move in a straight line with constant speed, unless acted on by a resultant force.

22
Q

What is air resistance?

A

A friction force acting in the opposite direction to the movement of the object.

23
Q

What is the acceleration of free fall?

A

An object falling freely from rest will accelerate at 10m/s² due to gravity.

24
Q

What is terminal velocity?

A

The constant velocity reached by a falling object when magnitude of the air resistance force is equal to the magnitude of the weight of the object.

25
Q

State Newton’s Second Law of Motion.

A

The force applied to an object is equal to the mass multiplied by the acceleration.

26
Q

Fill in the blank: Speed = _______ ÷ time.

A

distance

27
Q

Fill in the blank: Velocity = _______ ÷ time.

A

displacement

28
Q

What is the formula for average speed?

A

Average speed = initial speed + final speed/2
Or
S= d/t

29
Q

What is the formula for average velocity?

A

Average velocity = Total displacement ÷ Total time.

30
Q

What is the formula for rate of change of speed?

A

Rate of change of speed = (final speed - initial speed) ÷ time (V-U/T)

31
Q

What is the formula for acceleration?

A

Acceleration = final velocity - initial velocity / t

32
Q

What is the formula for resultant force?

A

Resultant force = mass X acceleration

33
Q

What does the gradient of a distance-time graph represent?

A

Speed

34
Q

What does the area under a velocity-time graph represent?

A

Displacement

35
Q

What is the relationship between velocity and time in a velocity-time graph?

A

Acceleration

36
Q

What does the gradient of a velocity-time graph indicate?

A

Rate of change of speed

37
Q

Fill in the blank: Speed is represented on a _______ graph.

A

Speed - Time

38
Q

True or False: The area under a distance-time graph represents acceleration.

A

False

39
Q

Newtons 3rd Law

A

When objects interact with each other, they always have an equal and opposite reaction

GCSE Higher Tier Physics (2 decks)

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