Question

Define Displacement. A car travelling at 36km/h speeds up to 72km/h in
5 seconds. Find its acceleration. If the same car stops in 20 sec, calculate
its negative acceleration.​

Answer 1

Answer:

A car travelling at 36km/h speeds upto 72km/h in 5 seconds. ... In the second case , u=72km/h=20m/s,v=0,t=20s.

Explanation:

hope it helps you

Answer 2

Answer:

hope this will help you

Explanation:

Here, ` u = 36 km//h = 10 m//s , v = 72 km//h = 20m//s , t = 5 s`

`a = ( v - u)/( t) = ( 20 - 10)/(5) = 2 m//s^(2)`

In the second case , `u = 72 km//h = 20 m//s , v = 0 , t = 20s`.

` a = ( v - u) /(t) = ( 0 - 20)/( 20) = - 1 m//s^(2)`