A ticker timer makes 50 dots per second. When a body is pulled by a tap through the timer, the distance between the third and fourth dot is 3cm and the distance between the fourth and fifth dot is 4cm. what was the acceleration of the body?

The acceleration is 1 cm/s^2.

Explanation:

The acceleration is defined as the rate of change of velocity.

Here, initial velocity, u = 3/1 = 3 cm/s

final velocity, v = 4/1 = 4 cm/s

time, t = 1 s

Let the acceleration is a.  

Use first equation of motion

v =  u + at

4 = 3 + 1 x a

a = 1 cm/s^2

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