Autumn 2 P9

Question 1

Speed and distance time graphs.

Answer 1

To find the speed (meters per second) find the distance travelled (meters) divided by the time taken (seconds).

For a distance time graph the gradient of the line on a distance - time graph represents speed

Question 2

Velocity and acceleration

Answer 2

Velocity= speed in a given direction

Displacement= The distance travelled in a given direction

Acceleration= The acceleration of an object is its change of velocity per second.

Question 3

What is acceleration measured in?

Answer 3

Meters per second squared (m/s2)

Question 4

Write the equation for acceleration

Answer 4

a= v-u
—–
t

Question 5

Braking

Answer 5

Braking reduces the velocity of a vehicle. The velocity is consistent until the driver applies the brakes.

Question 6

Analysing Distance Time Graphs

Answer 6

On a graph, the graph represents the distance travelled on the y axis and the time taken on the x axis.
The gradient represents the speed.

Question 7

Velocity time graphs

Answer 7

Acceleration=

  time taken

You can work out the acceleration by calculating the gradient.

Question 8

More analysing motion graphs

Answer 8

Make sure that you know the distance time and speed triangle to either multiply or divide