A ball thrown vertically upwards with a speed of `19.6ms^(-1)` from the top of a tower returns to the Earth in 6s. Find the height of the tower. `(g=9.8m//s^(2))`

Explanation

When ball is given spin at the top, the velocity of air above the ball is higher than below the ball. According to Bernoulli’s theorem, die pressure above the ball is less than the pressure below the ball. Thus, there is net upward force on the spinning ball and hence the ball follows a curved path. This effect is known as the Magnus effect.