This document discusses projectile motion and contains questions about calculating the maximum height, position, and velocity of a ball thrown upwards from the top of a cliff at 30 m/s. It asks the reader to calculate: a) the maximum height reached, b) the position after 4 seconds, c) the velocity after 4 seconds, d) the position after 6.5 seconds, and e) the position 3 seconds after reaching maximum height. It provides headings to guide the calculations for each question.

1. Projectile motion
Equations of motion

2. Questions
A ball is thrown upwards at 30 m•s-1 from the top of a
high cliff. Calculate the:
a. ball’s maximum height it reaches above the point it
leaves the thrower’s hand.
b. ball’s position 4 s after leaving the thrower’s hand.
c. ball’s velocity 4 s after leaving the thrower’s hand.
d. ball’s position 6,5 s after leaving the thrower’s hand.
e. ball’s position 3 s after being at its highest point.
f. time(s) when the ball is 5 m above the thrower’s
hand.

3. Maximum height
a. Calculate the maximum height it
reaches above the point it leaves the
thrower’s hand.

5. a. Maximum height

8. Height at given time 1
b. Calculate its position 4 s after
leaving the thrower’s hand.

11. b. Height at 4 s

13. Velocity at given time
c. Calculate its velocity 4 s after
leaving the thrower’s hand.

15. b. Velocity at 4 s

18. Height at given time 2
d. Calculate its position 6,5 s after
leaving the thrower’s hand.

21. d. Position at given time 2

24. Height at given time 3
e. Calculate its position 3 s after
being at its highest point.

27. e. Position at given time 3