Question

A car occupies a speed of 18 kilometre per hour in 5 second what is its acceleration​

Answer 1

Answer:

1 m / sec²

Explanation:

We have :

Initial velocity u = 0 m / sec

Final velocity v = 18 km / hr

Final velocity in term of m / sec :

v = 18 × 5 / 18

= > v  = 5 m / sec

Time t = 5 sec

Using first equation of motion :

v = u + a t

= > a = ( v - u ) / t

Putting values here we get :

= > a = ( 5 - 0 ) / 5 m / sec²

= > a = 5 / 5 m / sec²

= > a = 1 m / sec²

Therefore , acceleration of car is 1 m / sec² .