A stone is thrown in a vertically upward direction with a velocity of 15m/s. If the acceleration of the stone during its motion is 10m/s2 in the downward direction, whatwill be the height attained by the stone and how much time will it take to reach there?

A stone is thrown in a vertically upward direction with a velocity of

1.	A stone is thrown in a vertically upward direction with a velocity of 15m/s. If the acceleration of the stone during its motion is 10m/s2 in the downward direction, whatwill be the height attained by the stone and how much time will it take to reach there?
Answer» a=-10m/s²v=0m/s∴v²=u²+2as⇒0=(15)²+2(-10)s⇒0=225-20s⇒20s=225⇒s=225/20⇒s=11.25m∴v=u+at⇒0=15+(-10)t⇒10t=15⇒t=15/10⇒t=1.5s