Question

2 1 (a) Define acceleration. (b) Fig. 1.1 shows the distance-time graph for the joumey of a cyclist. 350 द 300 distance/m 250 200- 150 100 50 5 10 15 20 25 40 30 35 timels Fig. 1.1 (1) Describe the motion of the cyclist in the time between: 1. time = 0 and time = 15 s 2. time = 15 s and time = 30 S 3. time 30s and time = 40 S. (11) Calculate, for the 40 s journey 1. the average speed​

Answer 1

Acceleration is the rate of change of velocity.

or

It is the derivative of velocity

i.e.

$\frac{dv}{dt} = a$

∆v/∆t