Everything Science Grade 12

6.2 CHAPTER 6. MOTIONIN TWO DIMENSIONS

t(s)

a( m· s−^2 )

2 , 58

− 9 , 8

Example 4: Analysing Graphs of Projectile Motion

QUESTION

The graph below (not drawn to scale) shows the motion of tennis ballthat

was thrown vertically upwards from an open window some distance from the

ground. It takes the ball 0,2 s to reach its highest point before falling back to

the ground. Study the graph given and calculate:

1. how high the windowis above the ground.


2. the time it takes theball to reach the maximum height.


3. the initial velocity ofthe ball.


4. the maximum heightthat the ball reaches.


5. the final velocity of the ball when it reachesthe ground.