Question

s = t3-6t2 . find velocity at t=1s, 2s and 3s . find the time taken when the body is rest.

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Answer 1

Explanation:

=6t

2

−t

3

v=

dt

ds

=12t−3t

2

If. v=0, then 12t−3t

2

=0 .... (A)

Solving, we get t=0 sec or t=4 sec

Thus, the particle will attain zero velocity at the time of 4 seconds.

Answer 2

Answer:

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