- #1
markosheehan
- 136
- 0
a stone us thrown vertically upwards under gravity with a speed of u m/s from a point 30 metres above the horizontal ground. the stone hist the ground 5 seconds later.
(i) find the value if u
(i)find the speed with which the particle hits the ground.
can someone help me work this out. i tried to divide it into 2 different parts. from when the stone is thrown up to when it gets to v=0 and then from when it drops back down to earth. i tried to use uvast equations and i could say the 1st bit has time t and the next bit has 5-t time but the intial speeds are not the same so i don't know what to do
(i) find the value if u
(i)find the speed with which the particle hits the ground.
can someone help me work this out. i tried to divide it into 2 different parts. from when the stone is thrown up to when it gets to v=0 and then from when it drops back down to earth. i tried to use uvast equations and i could say the 1st bit has time t and the next bit has 5-t time but the intial speeds are not the same so i don't know what to do