Question

A body covers 400m in 20 sec.starting from rest.find it acceleration

Answer 1

as we know

acceleration= change in velocity over time

so,we can solve it by using formula i.e

, a=v-u/t

or v=u+at

here u=0(cause it starts from rest so initial velocity will be taken as 0)

v= 400

and t=20 second

thus, v=u+at

400=0+a×20

400=20a

a=400/20

a=20m/s(square)

hope it helps

Answer 2

Answer:

1 M/s^2

Explanation:

a=(v-u)/t

Here,

Distance=400m

Time t=20 sec

u=0

v=(distance)/time

v=400÷20=20m/s

Then,

a=(v-u)/t

a=(20-0)/20

a= 1 m/s^2