A diver makes 4 revolutions on the way from a 4.9 m platform above the water surface. Assuming zero initial vertical velocity, calculate the average angular velocity of the diver. [Take g=9.8 m/s2]
The correct option is A 8π rad/s
We know that the average angular velocity is given by
Since the diver makes four revolutions, the angular displacement of the diver is Δθ=4×2π=8π rad
Now, as the dimension of the diver is not mentioned here, we can consider it as a small particle falling freely under gravity.
Time taken to fall is
Thus, average angular velocity is