# physics

Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 5.97 m. The stones are thrown with the same speed of 8.50 m/s. Find the location (above the base of the cliff) of the point where the stones cross paths.

1. 👍 0
2. 👎 0
3. 👁 1,231
1. d1 + d2 = 5.97 m.
Vo1*t+o.5g*t^2 + Vo2*t+0.5g*t^2 = 5.97
8.5t + 4.9t^2 + 8.5t - 4.9t^2 = 5.97
17t = 5.97
t = 0.351 s. = Time at which they met.

h1 =5.97-(8.5*0.351 + 4.9*(0.3510^2) = 2.38 m. Above base of cliff.

h2 = 8.5*0.351 - 4.9(0.351)^2 = 2.38 m.
Above the base of cliff.

The stones cross paths at 2.38 m above base of cliff.

1. 👍 0
2. 👎 0
2. the other straight downward from the top of the cliff. The stones are thrown with the same speed. The height of the cliff is 6.00 m, and the speed with which the stones are thrown is 9.00 m/s. Find the location of the crossing point.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### science

a ball is thrown straight upward and returns to the thrower's hand after 3.00s in the air. A second ball is thrown at an angle of 30.0 deg with the horizontal. At what speed must the second ball be thrown so that it reached the

2. ### PHYSICS HELP

A 0.26-kg rock is thrown vertically upward from the top of a cliff that is 31 m high. When it hits the ground at the base of the cliff, the rock has a speed of 29 m/s . a.Assuming that air resistance can be ignored, find the

3. ### Math

For this problem, a person standing on the edge of a cliff throws a rock directly upward. it is observed that 2 secs later the rock is at its maximum height (in feet) and that 5 secs after that (meaning 7 seconds after being

4. ### physics

A drives straight off the edge of a cliff that is 54m high.the police at the scene of the accident obseve that the point of impact 130m from the base of the cliff.How fast was the car traveling when it went over the cliff?

1. ### Physics ?#2

A ball is dropped from the top of a 53.0m high cliff. At the same time, a carefully aimed stone is thrown straight up from the bottom of the cliff with a speed of 25.0m/s The stone and ball collide part way up. How far above the

2. ### Physics

From the top of a cliff overlooking a lake, a person throws two stones, as shown in the drawing. The cliff is 39.2 m high. The two stones described have identical initial speeds of v0 = 19.2 m/s and are thrown at an angle θ =

3. ### Science

A stone is dropped from a height of 49m and simultaneously another stone is thrown upwards from the ground with a speed of 40m/s.when and where do the two stones meet?

4. ### Physic

A ball is thrown horizontally from a cliff at a speed of 15 m/s and strikes the ground 45 meters from the base of the cliff. How high was the cliff (rounded to the nearest meter)

1. ### Physics

Two stones are dropped from the edge of a 60-m cliff, the seconds stone 1.6s after the first. How far below the top of the cliff is the second stone when the separation between the two stones is 36 m?

2. ### math

A ball is thrown from the edge of a cliff with an initial velocity of 60·m/s upward. Answer the following questions using + (upward) and - (downward) to indicate the direction of the velocity. Ignore air resistance and assume the

3. ### physics

A stone is thrown straight up from the ground with an initial speed of 30.5 m/s . At the same instant, a stone is dropped from a height of h meters above ground level. The two stones strike the ground simultaneously.Find the

4. ### physics

A rock is thrown vertically upward from the edge of a cliff. The rock reaches a maximum height of 20.6 m above the top of the cliff before falling to the base of the cliff, landing 6.54 s after it was thrown. How high is the