Question

A car moving with speed of 20 m/s comes to rest in 40 seconds. Find its Acceleration and SHOW HOW U DO IT

Answer 1

Answer:

0.5m/s²

Explanation:

Given: v =20 m/s

u =0 m/s

t = 40s

a = v-u/t

=>a =[(20 -0)/ 40] m/s²

=> a = 0.5 m/s²

Thus, its acceleration is 0.5m/s²

Answer 2

Answer:

5m/s

Explanation:

Using 3rd equation of motion

v²=u²+2as

Final velocity will be 0m/s bcuzz the car will come at rest

Initial velocity will be 20m/s

Putting in the formula

(0)²=(20)²+2a×40

(-20)²=80a

400=80a

400/80=a

5m/s=a

So it's acceleration will be 5m/s