Question

When an object speeds up from 10 m/s to 70 m/s in 3 s, then its
acceleration is
A. 20 m/s square
B. 21 m/s square
C. 26 m/s
D. 20 cm/s square
Other:​

Answer 1

Answer:

a =v-u/t

a=70m/s-10m/s÷3sec..(here v=70m/s andu=10m/s)

a=60m/s/3sec

a=20m/s^2. ans..

Answer 2

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The answer may be :-

A) 20 m/s square