Question

A ball is thrown vertically upward from the edge of a cliff,
with an upward velocity of 20 m/s. On its way back down, it just
misses the end of the cliff.

(a) Find the position and velocity of the ball 1 s and 4 s
after it is thrown;

(b) Find the velocity of the ball when it is 5 m above the
flat surface of the cliff. Write the magnitude of the velocity in
the Answer box below (unit m/s);

(c) Find the maximum height reached and the time at which it
is reached;

(d) Draw the position-time, velocity-time and
acceleration-time graphs for this throw (three separate
graphs).

Ignore the effects of the air.

Answer #1

URGENT
A ball is thrown vertically upward from the edge of a cliff,
with an upward velocity of 20 m/s. On its way back down, it just
misses the end of the cliff.
(a) Find the position and velocity of the ball 1 s and 4 s
after it is thrown;
(b) Find the velocity of the ball when it is 5 m above the
flat surface of the cliff. Write the magnitude of the velocity in
the Answer box...

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