Answered: A rock thrown downward with an unknown…

A rock thrown downward with an unknown initial velocity from a height of 1000 feet reaches the ground in 5 seconds. Find the velocity of the rock when it hits the ground.

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter2: Kinematics

Section: Chapter Questions

Problem 57PE: A coin is dropped from a hot-air balloon that is 300 m above the ground and rising at 10.0 m/s...

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Question

A rock thrown downward with an unknown initial velocity from a height of 1000 feet reaches the ground in 5
seconds. Find the velocity of the rock when it hits the ground.
O a.
-280 ft/sec
Ob.
-214.5 ft/sec
O c. -180.25 ft/sec
O d. -145 ft/sec

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