(i)[3]
Show that the tower has height $50\,\text{m}$.
(ii)[5]
Find the time for which ball $B$ has been moving by the moment ball $A$ reaches the ground. Hence find the total distance covered by ball $B$ by the time ball $A$ reaches the ground.
Mathematics 9709 · AS & A Level · Kinematics of motion in a straight line
Kinematics of motion in a straight line — practice question
Ball $A$ is let go from rest at the top of a tall tower. After $1$ second, ball $B$ is projected vertically upwards from ground level close to the base of the tower at a speed of $20\,\text{m s}^{-1}$. The balls are at the same height $1.5\,\text{s}$ after ball $B$ is projected.