Question

54. A particle is projected with a speed 10 2 m/s
and at angle 45° with the horizontal. The rate of
change of speed with respect to time at t=1s is
(g = 10 m/s)
10
(1) 10/√2 m/s²
(2) 10 m/s²
(3) zero
(4) 5 m/s²
note:- the answer of this question is 3 option but I complete explaination ​

Answer 1

Answer:

Yes, the answer is Zero

Explanation:

At t = 1s, particle is at maximum height. Angle

between velocity vector and acceleration vector

is 90º. Hence at this position rate of change of

speed with respect to time is zero.

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