Answered: A rock of mass 1.0 kg is dropped from a…

A rock of mass 1.0 kg is dropped from a height of 10 m. What will be its velocity just before it strikes the ground? What if the height is 100 m? (Neglect air friction)

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter6: Energy Of A System

Section: Chapter Questions

Problem 11CQ

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Question

15. A rock of mass 1.0 kg is dropped from a height of 10 m. What will be its velocity just before it strikes the ground? What if the height is 100 m? (Neglect air friction)

PS: we are given a set of equations to use in the homework. They are in the screenshot below. Also, pretty sure that we need the equation v=sqrt(2gh) , though it is not in the list of equations provided to us.

v = { (average speed) d = v,t + at? (distance under acceleration)
W %3D mg (Weight) а %3
Fact
(Acceleration) F= Gm,m2
(Gravity Law)
(Kinetic Energy) PE=mgh (Potential Energy)
p = mv
W = F ·d (Work Done) Q= mcAT (Heat Energy) Q=mL (Latent Heat Energy)
effciency =
%3D
work done
energy provided

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