Question

A rock is dropped from the top of a vertical cliff and takes 4.3 ss to reach the ground below the cliff. A second rock is thrown vertically downward from the cliff, and it takes this rock 2.00 s to reach the ground below the cliff from the time it is released. With what speed was the second rock thrown, assuming no air resistance?

Name: a rock is dropped from the top of a vertical cliff and takes 43 ss to reach the ground below the cliff a second rock is thrown vertically downward from the cliff and it takes this rock 200 s 74226
Uploaded: 2021-10-11T14:02:05-08:00
Duration: 1 min 55 s
Channel: Paul Gabriel
Description: a rock is dropped from the top of a vertical cliff and takes 43 ss to reach the ground below the cliff a second rock is thrown vertically downward from the cliff and it takes this rock 200 s 74226

          A rock is dropped from the top of a vertical cliff and
takes 4.3 ss to reach the ground below the cliff. A
second rock is thrown vertically downward from the cliff, and it
takes this rock 2.00 s to reach the ground below the cliff from the
time it is released. With what speed was the second rock thrown,
assuming no air resistance?

Added by Agust-N L.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Paul Gabriel

10/11/2021

Step 1

3 seconds. Given: Time taken for the first rock to fall, t1 = 4.3 s Acceleration due to gravity, a = 9.81 m/s^2 Using the equation: s = ut + (1/2)at^2 Substitute the values: s = 0 + (1/2)(9.81)(4.3)^2 s = 0 + (1/2)(9.81)(18.49) s = 0 + 90.69 s = 90.69 meters Show more…

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A rock is dropped from the top of a vertical cliff and takes 4.3 ss to reach the ground below the cliff. A second rock is thrown vertically downward from the cliff, and it takes this rock 2.00 s to reach the ground below the cliff from the time it is released. With what speed was the second rock thrown, assuming no air resistance?