Consider the conservation of energy equation below. ?K + ?U + ?Eint = W + Q + TM
ID: 2992546 • Letter: C
Question
Consider the conservation of energy equation below.?K + ?U + ?Eint = W + Q + TMW +TET + TER
A ball of mass m falls from a height h to the floor.
?K + ?U = 0
Use this equation to calculate the speed of the ball just before it strikes the Earth. (Use the following as necessary: m for mass, h for height, g for acceleration due to gravity.)
v =
?K = W
Use this equation to calculate the speed of the ball just before it strikes the Earth. (Use the following as necessary: m for mass, h for height, g for acceleration due to gravity.)
v =
Explanation / Answer
(1/2)mv2 - mgh = 0
v = (2gh) m/s
2) (1/2)mv2 = mgh
v = (2gh) m/s
here potential energy is the work done by the gravity on it