Calculate
A ball was thrown vertically upwards from a point A on the ground. The height of the ball
above the ground, 6 seconds after being thrown, was s metres, where s=251 - 502
(a)Calculate the height, in meters, of the ball above the ground 1 second after it was thrown.
(b)Find an expression, in terms oft, for the speed of the ball after seconds.
(c)the speed with which the ball was thrown.
(d)the value oft when the speed of the ball was zero.
(e)the greatest height above A that the ball reached,
(O the time which elapsed from when the ball was thrown
until it was first at a height of 30 metres
above A
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