Question

A car accelerates uniformly for 18khm to 36khm in 5sec. The acceleration of the car in that time is

Answer 1

Given :-

•u = 18km/hr = 18(5/18) = (1 ×5)= 5m/s

• v = 36km/hr = 36(5/18)= (2×5) = 10m/s

• t = 5sec

Find:-

The acceleration of the car.

SOLUTION :-

=> As we know that,

=> v= u+ at---------(formula)

=> 10= 5 + a × 5

=> 10a = 10

=> a = 1m/s².

_______________

=> As we know that,

=> a = (v-u)/t----------(formula)

=> a = ( 10-5)m/s / 5s

=> a = 5m/s / 5s

=> .°. a = 1m/s².

Hence, the acceleration of the car is 1m/s².

Answer 2

SOLUTION

$\bold{Given}$

Initial velocity (u) = 18 km/h

                             = 5 m/s

Final velocity (v) = 36 km/h

                           = 10 m/s

Time = 5 seconds

$\bold { Formula \ to \ be \ used} - \boxed{\boxed{ v = u + at}}$

Substituting the values, we get,

$10 = 5 + a(5)\\=> 10-5 = a(5)\\=> a = 1 m/s^{2}$

$\boxed{\boxed {\underlined {\bold{Therefore, \ the \ acceleration \ of \ the \ car \ is \ 1 \ m/s^{2} }}}}$