Question

A car travelling at 20 ms-1 takes a u turn in 20s without changing its speed what is the averege acceleration of the car​

Answer 1

Explanation:

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

It takes u turn, so that, its final speed becomes, v = -20 m/s

Time, t = 20 s

To find,

The acceleration of the car.

Solution,

The rate of change of velocity is called acceleration of an object. It is given by :

\begin{gathered}a=\dfrac{v-u}{t}\\\\a=\dfrac{(-20)-20}{20}\\\\a=-1\ m/s^2\end{gathered}

a=

t

v−u

a=

20

(−20)−20

a=−1 m/s

2

So, the magnitude of of acceleration of the car is 1\ m/s^21 m/s

2

.

Answer 2

Answer:

a=-2m/s^2

Explanation:

v=-20(as car takes u-turn , which is in opposite direction of motion)