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Physics > GCSE - Topic 3 - Working Scientifically > Flashcards

GCSE - Topic 3 - Working Scientifically Flashcards

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1
Q

How does a greater distance or force effect a moment?

A

The greater the distance/moment, the greater the moment.

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2
Q

What is a moment?

A

The turning effect of a force.

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3
Q

What is the equation for a moment when given force and distance?

A

Force x Distance = Moment

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4
Q

In a velocity-time graph, what does a straight, horizontal line mean?

A

The object is travelling at a constant speed.

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5
Q

In a velocity-time graph, what does a straight, diagonal line going downwards mean?

A

It’s decelerating.

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6
Q

In a velocity-time graph, what does a straight, diagonal line going upwards mean?

A

It’s accelerating.

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7
Q

In a distance-time graph, what does a straight, horizontal line mean?

A

The object is stationary.

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8
Q

In a distance-time graph, what does a diagonal line going upwards mean?

A

It’s going at a constant speed forwards.

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9
Q

In a distance-time graph, what does a diagonal line going downwards mean?

A

It’s going at a constant speed backwards.

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10
Q

What is a scalar quantity? (Definition)

A

Something that has a magnitude/size/quantity but no direction.

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11
Q

What is a vector quantity? (Definition)

A

Something that has a magnitude and a direction.

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12
Q

What is displacement?

A

The direction from the starting point and the length of a straight line from the starting point to the ending point.

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13
Q

What is the law of moments?

A

If the anticlockwise moments equal the clockwise moments, the system will balance.

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14
Q

How does the stiffness of a spring affect the spring constant?

A

The stiffer the spring, the greater the spring constant.

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15
Q

What is the limit of proportionality?

A

The limit of proportionality refers to the point beyond which Hooke’s law is no longer true when stretching a spring.

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16
Q

What is Hooke’s law?

A

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

17
Q

What is the elastic limit?

A

The elastic limit of a material is the furthest point it can be stretched or deformed while being able to return to its previous shape.

18
Q

Weight

A

W = m x g

Where’s = Mr. G

Weight = Mass × Gravitational field strength (G)

19
Q

Work Done

A

W = F x s

Widow = Farted Stealthily

work done = force × distance along the line of action of the force

20
Q

Force Applied To a Spring

A

F = k x e

Fancy = kissing elvis

force applied to a spring = spring constant × extension

21
Q

Moment

A

M = F d

Mmmm! = Flour dumplings

moment of a force = force × distance

22
Q

Distance Travelled

A

s = v x t

Soft = Velvet Trolls

distance travelled = speed × time

23
Q

Acceleration

A

change in velocity = time x acceleration

a = ∆ v ÷ t

or

∆ v = a x t

Change V = at (taxes)

24
Q

What is mass?

A

The amount of matter in an object.

25
Q

What is weight?

A

The force acting on an object due to gravity.

26
Q

What type of quantity is displacement?

A

Vector.

27
Q

What type of quantity is velocity?

A

Vector.

28
Q

What type of quantity is distance?

A

Scalar.

29
Q

What type of quantity is speed?

A

Scalar.

30
Q

What type of quantity is force?

A

Vector.

31
Q

Define work done.

A

This occurs when a force moves an object for a distance.

32
Q

Units for work done?

A

Joules.

33
Q

State three factors that could affect a person’s walking speed.

A

Age, fitness, terrain.

34
Q

State two ways in which friction on a moving object can be overcome.

A

Using a lubricant, smoother surfaces, make the object more streamlined.

35
Q

What is terminal velocity?

A

When the resultant force on an object is 0, so the object falls at a steady speed.

36
Q

What is the centre of mass of an object?

A

The point at which the mass may thought to be concentrated.

37
Q

What is the typical walking speed?

A

1.5m/s

38
Q

What is the typical running speed?

A

3m/s

39
Q

What is the typical cycling speed?

A

6m/s

Physics (3 decks)

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