- #1
Roro312
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Homework Statement
A bridge is 25 m above a road below. If a .20kg stone is thrown upward from the bridge at 22.0m/s, calculate:
a) the gravitational energy of the stone as it is thrown upwar
b) the kinetic energy of the stone as it is thrown up
c) the maximum height (above the ground) achieved by the stone
d) the speed of the stone as it hits the road
e) the total mechanical energy of the stone as it falls pat the bridge on the way down
Homework Equations
Emech= Eg+ Ek
Ek= 1/2mv^2
Eg= mgh
The Attempt at a Solution
a) Eg= (.20)(9.8)(25)
= 49J
b) Ek= (.2)(9.8)(1.5)
=1.47J
the rest i don't get ...im soo confused and i have a test tomorrow
please help me