Question

A body starting from rest covers a distance of 0.45 km and acquires a velocity of 300
km/hr. Its acceleration will be:
(A) 0.092 ms
(C) 7.71 ms
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(B) 0.5 ms
(D) 0.15 ms?
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Answer 1

u = o km/hr.

s = 0.45km

v = 300 km/hr

time = distance / speed

t = 0.45 / 300-0

= 45 /30000

=0.0015 sec

first equation

v = u + at

300= 0 + a * 0.0015

300 = 0.0015 a

a = 300 /0.0015

= 3000000/ 15

= 200000 m/s ^2

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Answer 2

Explanation:

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