Mathematics, 22.08.2021 16:30 jessiebotello7209
if a stone is theown vertically upward with a speed of u metres per second then it's speed after t seconds is given by v=u-9.8t. If the stone has an initial upward speed of 70m/s, find: a) its speed after 5 seconds. b) it's speed after 8 seconds. How do you interpret the negative answer? c) the time taken for the stone to reach its maximum height.(answer correct to two decimal place).
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