Question

A car moving with constant acceleration was found to be having a speed of 36 km/hr at
certain point of time. After 2 seconds it's speedometer showed 54 km/hr. What is its
acceleration?
(A) 2.5 ms-2
(B) 5 ms-2
(C) 10 ms-2
(D) 3 ms-2​

Answer 1

Answer:

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Answer 2

Answer:

A) 2.5m/^2

Explanation:

initial velocity (u) = 36 km/hr

=36*5/18 m/s

=10 m/s

time (t) =2 s

final velocity (v) = 54 km/hr

=54*5/18 m/s

=15 m/s

hence, acceleration (a) = (v-u)/t

=(15-10)/2

=5/2

=2.5 ms-2

hope it helps