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A body moving along a straight line at 2...

A body moving along a straight line at 20 m/s undergoes an acceleration of 4 `m/s^(2)`· After two seconds its speed will be

A

8 m/s

B

3 `m/s^(2)`

C

16 m/s

D

28 m/s

Text Solution

Verified by Experts

Here, u = 20 m/s
a=4 m/s2
t = 2s v = ?
Using v = u + at, we get
v = 20 + 4 `xx` 2
= 28 m/s .
Therefore, (4) is the correct answer.
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