Question

The velocity of a body changes from from 30m/s to 60 m/s. THe time taken for this change when the acceleartion is 5 m/s² is
a) 12 s
b) 4s
d) 8 s
d) 6s

Answer 1

Answer:

option d) 6s is the correct answer.

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Answer 2

Answer:

Correct option is

B

4 m/sec

v

i

=10 m/s and v

f

=20 m/s

Acceleration of the body =

5

20−10

m/s

2

a=2 m/s

2

Velocity of the body at t=−3 sec

v=u+at

v=10−2×3

v=4 m/s