P1: Motion

Question 1

What does the distance-time graph for an object at a constant speed look like?

Answer 1

A straight line that slopes upwards.

Question 2

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

Answer 2

Speed

Question 3

Speed in m/s =

Answer 3

Distance travelled in m
_____________________
Time taken in s

Question 4

Velocity

Answer 4

Speed in a given direction.

Question 5

Displacement

Answer 5

Distance in a certain direction.

Question 6

Vector

Answer 6

A physical quantity that has a direction and a magnitude.

Question 7

Scalars

Answer 7

A physical quantity that has a magnitude only and not a direction.

Question 8

Examples of Scalars

Answer 8

Speed
Distance
Time
Mass
Energy
Power

Question 9

Examples of Vectors

Answer 9

Force
Momentum
Weight
Gravitational Field Strength

Question 10

Acceleration

Answer 10

An objects change of velocity per second.

Question 11

Acceleration m/s(2) =

Answer 11

Change in velocity m/s
_____________________
Time taken s

Question 12

What does the gradient of the line on a velocity-time graph represent?

Answer 12

Acceleration

Question 13

What does the distance-time graph of a stationary object look like?

Answer 13

A horizontal line

Question 14

What does the area underneath a velocity/time graph represent?

Answer 14

Distance travelled.

Question 15

How to find the gradient of a distance-time graph

speed

Answer 15

Draw a triangle under the line.

gradient of the line= height of the triangle/ base of the triangle (rise/run)

Question 16

How to find the gradient of a velocity -time graph

acceleration

Answer 16

The height of the triangle under the line/ base of the triangle under the line
(acceleration = change of velocity/ time taken)
(rise/run)

Question 17

Practical for measuring distance:

Answer 17

> Measure out a distance
> Station someone at either end.
> 1st student gives a signal as the vehicle passes
> Second student starts timing.
> Stop timing when vehicle passes.
> Calculate speed as distance/time