physics
posted by hana .
A stone is thrown vertically upward with a speed of 11.5 m/s from the edge of a cliff 95.0 m high.
(a) How much later does it reach the bottom of the cliff?
(b) What is its speed just before hitting?
(c) What total distance did it travel?
For (c), the right answer is 108.46 m. I really need help on parts (a) and (b) please!

(a) Solve this for time t:
Y = 11.5 t 4.9 t^2 = 95
(b) V^2(final)  V^2(initial) = 2 g H
(Easily derived using conservation of energy)
H is the distance the stone falls, 95 m
(c) You said you got this already. It would be twice the distance it goes up (since it comes back down), plus 95m
Total distance = (V^2/g) + H
Respond to this Question
Similar Questions

physics
A stone is thrown vertically upward with a speed of 10.0 m/s from the edge of a cliff 59.0 m high. How much later does it reach the bottom of the cliff? 
Physics
A stone is thrown vertically upward with a speed of 12.0 m/s from the edge of a cliff 85.0 m high (Fig. 234). (a) How much later does it reach the bottom of the cliff? 
physics
A stone is thrown vertically upward with a speed of 14.0 m/s from the edge of a cliff 89.0 m high 
physics
A stone is thrown vertically upward with a speed of 11.5 m/s from the edge of a cliff 95.0 m high. (a) How much later does it reach the bottom of the cliff? 
physics
A stone is thrown vertically upward with a speed of 11.5 m/s from the edge of a cliff 95.0 m high. (a) How much later does it reach the bottom of the cliff? 
science
A stone is thrown vertically upward with a speed of 11.0 m/s from the edge of a cliff 80.0 m high. How much later does it reach the bottom of the cliff? 
physics
A stone is thrown horizontally at a speed of 4.8 m/s from the top of a cliff 88.5 m high. How long does it take the stone to reach the bottom of the cliff? 
physics
a stone is thrown vertically upward with a speed of 10.5 m/s from the edge of a cliff 76.0 m high. how much later does it reach the bottom of cliff? 
physics for physical science
A stone thrown vertically upwards with a speed of 12m/s from the edge of Cliff 70m high. Calculate the time the stone takes to hit the bottom of the cliff. 
physics
a stone is thrown vertically upward at a speed of 10 m/s from a cliff that is 95m high. How long will it take the stone to reach the bottom?