A boy on a cliff 49 m high drops a stone. One second later, he throws a second stone after the first. They both hit the ground at the same time. With what speed did he second stone?

A boy on a lift 490 m high drops a stone. One second later, he throws a second stone after the first. They hit the ground at the same time. With what speed did he thrown the second stone.

A stone is dropped into a river from a bridge 53.6 m above the water. Another stone is thrown vertically down 1.00 s after the first is dropped. The stones strike the water at the same time. (a) What is the initial speed of the second stone ? (b) Plot velocity versus time on a graph for each stone, taking zero time as the instant the first stone is released .

A stone is dropped from the top of a tower of height 45 m. One second later another stone is thrown down from the town of the same tower. Both stones reach the ground at the same time. If (g= 10 m/s^2), magnitude of the initial velocity of the sound stone is

A stone is dropped into water from 80 m above and a second later, another stone is thrown vertically down. Both stones strike the water simultaneously. What is the initial speed of the second stone? Given g=9.8ms^(-2) .

While standing on a bridge 15.0 m above the ground, you drop a stone from rest. When the stone has fallen 3.20 m, you throw a second stone straight down. What initial velocity must you give the second stone if they are both to reach the ground at the same instant ? Take the downward direction to be the negative direction .

A stone is dropped from the top of a tower. If it hits the ground after 10 seconds, what is the height of the tower?

A stone is dropped from the top of a tower. If it hits the ground after 10 seconds, what is the height of the tower?