Question
Question: A particle is projected with a speed 10 \(\sqrt{2}\) m/s and at angle 45<sup>0</sup> with the horizo...
A particle is projected with a speed 10 2 m/s and at angle 450 with the horizontal. The rate of change of speed with respect to time at t = 1 s is (g = 10 m/s2)
A
210 m/s2
B
10 m/s2
C
zero
D
5 m/s2
Answer
zero
Explanation
Solution
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.