Question

A car is traveling at 20 m/s takes a U turn in 20 sec without changing it's speed what is the average acceleration of the car?

Answer 1

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Answer 2

The acceleration of the car is $-2\ ms^2$

Explanation:

Given that,

Initial speed of the car, u = 20 m/s

When it takes u turn, its speed does not change. Only its direction of motion changes such that the final speed, v = -20 m/s

Time, t = 20 s

We need to find the average acceleration of the car. We know that the rate of change of velocity is called acceleration of an object. Its formula is :

$a=\dfrac{v-u}{t}\\\\a=\dfrac{(-20)-20}{20}\\\\a=-2\ m/s^2$

So, the acceleration of the car is $-2\ ms^2$. Hence, this is the required solution.

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