Question

A parachute on a racing dragster opens and changes the speed of the car from 125m/s to 65m/s in a period of 4.5 seconds . What is the acceleration of the dragster

Answer 1

The acceleration of the dragster is 13.33

Explanation:

Given as :

The Final velocity of car = 65 m/s

The initial velocity of car = 125 m/s

The Time period for change of speed = 4.5 seconds

Now,

Acceleration is define as rate of change of velocity

So, Acceleration =
`(v_2-v_1)/(T)`

Or, Acceleration =
`(125-65)/(4.5)`

Or, Acceleration =
`(60)/(4.5)`

∴ Acceleration = 13.33

Hence The acceleration of the dragster is 13.33 Answer