In this question use g=9.8g = 9.8g=9.8 m s−2^{-2}−2
A ball A A\,A is released from rest at a point PPP, which is h h\,h metres above horizontal ground.
Exactly one second later a ball B B\,B is thrown vertically downwards from P P\,P with speed 14.7 m s−1^{-1}−1.
Both balls move freely under gravity and hit the ground at the same instant.
Show that A A\,A is in motion for 2 seconds before it hits the ground.
Find the value of hhh.
Find the difference between the speeds of the two balls as they hit the ground.
265 exam-style questions on AQA A Level Maths 3.2 Q: Kinematics, covering 3.2.1 Language of kinematics, 3.2.2 Graphs in kinematics, 3.2.3 Constant acceleration formulae, 3.2.4 Calculus in kinematics (A-level only), and 3.2.5 Motion under gravity and projectiles (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.