Question

A car accelerates uniformly from 18 km/h to 36 km/h in 5 minutes. The acceleration is

a.5 m/s2 b.1 km/s2 c.216 m/s2 d.216 km/h2​

Answer 1

Answer-:

(d)

Explanation-:

Acceleration= v-u/t

Here,

v= 36km/h

u=18km/h

t=5min= 1/12h

A=36-18/1/12

=216km/h2

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Answer 2

The acceleration due to gravity is 216 km/h2

Explanation:

Acceleration is change in speed with direction. The formula which will be used to solve this question is: v = u = at.

Here, v is final velocity (i.e. 36km/h given)

u is the initial velocity (i.e. 18km/h given)

t is the time (i.e. 5 minutes given)

a is  acceleration which is required to find.

a = (v-u)/t

a = (36-18)60/5

a = 216km/h