A ball is projected vertically upward from ground level with a speed of
PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A ball is projected vertically upward from ground level with a speed of 20m/s. A balcony is situated at a height of 15m above the ground. Take g=10m/s2.
(a) Write an equation in t for the instants when the ball is at the level of the balcony.
(b) Solve the equation to obtain the two times at which the ball is at balcony height.
(c) Calculate the time interval between these two instants.