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Physics GCSE > Section 17: Motion, Forces And Conservation Of Energy > Flashcards

Section 17: Motion, Forces And Conservation Of Energy Flashcards

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1
Q

What is a vector quantity

A

Something that has magnitude and direction

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2
Q

What is magnitude

A

Size

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3
Q

What is a scalar quantity

A

Something that only has magnitude

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4
Q

What quantity is force

A

Vector

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5
Q

What quantity is speed

A

Scalar

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6
Q

What quantity is temperature

A

Scalar

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7
Q

What quantity is time

A

Scalar

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8
Q

What quantity is momentum

A

Vector

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9
Q

What quantity is weight

A

Vector

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10
Q

What quantity is energy

A

Scalar

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11
Q

What quantity is velocity

A

Vector

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12
Q

What quantity is acceleration

A

Vector

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13
Q

What quantity is mass

A

Scalar

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14
Q

What quantity is displacement

A

Vector

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15
Q

What quantity is distance

A

Scalar

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16
Q

What are examples of vector quantities

A
  • force
  • velocity
  • displacement
  • weight
  • acceleration
  • momentum
17
Q

What are examples of scalar quantities

A
  • speed
  • temp
  • distance
  • time
  • mass
  • energy
18
Q

Distance

A

How far an object has moved, it is a scalar quantity so it doesn’t involve direction

19
Q

Displacement

A

It is a vector quantity so it measures the distance and direction in a straight line from the objects starting point to the finishing point.
So if you walk 5m north then 5m south, the displacement is 0m but the distance is 10m

20
Q

Speed

A

How fast you’re going with no regard to the direction

21
Q

Velocity

A

The speed in a given direction

22
Q

Equation for distance travelled

A

Distance travelled = speed x time

23
Q

Speed of walking

A

1.4 m/s

24
Q

Average speed of running

A

3 m/s

25
Q

Average speed of Cycling

A

5.5 m/s

26
Q

What is acceleration

A

The change in velocity in a certain amount of time
How quickly you’re speeding up

27
Q

How to work out average acceleration

A

a= (v-u)/t
a= acceleration
v = final velocity
u= initial velocity
t = time

28
Q

What is deceleration

A

The negative acceleration, if something slows down the change in velocity is negative

29
Q

How to work out constant acceleration

A

V^2 - u^2 = 2 X a X x

A= acceleration
x = distance

30
Q

Distance/time graphs

A

tells you how far something has travelled

31
Q

What do the different parts of the distance/time graphs show

A
  • gradient (slope)= at any point, shows us the speed of an object
  • flat sections= where it’s stopped
  • the steeper the graph the faster the speed
  • curves = represent the acceleration, if the curve is steep it means it’s speeding up.
  • a levelling off curve means it’s slowing down
32
Q

How to work out the speed of an object from a distance/time graph

A

Change in the vertical/change in the horizontal

33
Q

What is a tangent

A

A line that is parallel to the curve at that point

34
Q

What do the different parts of a velocity/time graph show

A

Gradient = acceleration
Flat section = steady speed
Steep line = greater acceleration
Uphill sections (/) acceleration
Downhill () deceleration
Curve = changing acceleration

35
Q

How to calculate the distance travelled on a time/velocity graph

A

The area under the graph

36
Q

Newton’s first law

A

If the resultant force on a stationary object is 0, the object will remain stationary.if. The resultant dove on a moving object is 0, it’ll just carry on moving at the same velocity

37
Q

Newton’s second law

A

F = m x a

Physics GCSE (7 decks)

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