Kinematics Question 1
O/N 18/P22/Q1
A golfer strikes a ball so that it leaves horizontal ground with a velocity of 6.0 ms-' at an angle 0 to the horizontal, as illustrated in Fig. 1.1.
Vy
4.8 ms-11
6.0m sl
ball-
ground
Fig. 1.1 (not to scale)
The magnitude of the initial vertical component v, of the velocity is 4.8 m s=1.
Assume that air resistance is negligible.
(a) Show that the magnitude of the initial horizontal component v, of the velocity is 3.6 ms='.
mac
[1]
(b) The ball leaves the ground at time t = 0 and reaches its maximum height at t = 0.49 s.
On Fig. 1.2, sketch separate lines to show the variation with time t, until the ball returns to the ground, of
(i) the vertical component v, of the velocity (label this line Y), (ii)
the horizontal component v of the velocity (label this line X).
[2]
[2]