(2) ION 8
A ball is projected vertically upwards with a speed of 10 m-s-t from point A,
which is at the top edge of a building. The ball hits the ground after 3 s. It is
in contact with the ground for 0,2 s and then bounces vertically upwards,
reaching a maximum height of 8 m at point B. See the diagram below. Ignore
the effects of friction.
8.1 Why is the ball considered to be in free fall during its motion?
B
8.2 Calculate the:
8.2.1 Height of the building
8 m
8.2.2 Speed with which the ball hits the ground
8.2.3 Speed with which the ball leaves the ground
-ground
aw a velocity versus time graph for the complete motion of the ball from A to B.
ow the following on the graph:
(3
(2

What if I don’t give you the answer

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction