Consider the conservation of energy equation below. A ball of mass m falls from
ID: 2006995 • Letter: C
Question
Consider the conservation of energy equation below.
A ball of mass m falls from a height h to the floor.
(a) Identify the appropriate version of the equation above for the system of the ball and the Earth.
^^^not sure how to go about this part....
(b) Identify the appropriate version of the equation above for the system of the ball.
i got K=W which is correct
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 =
^^^not sure how to get this part either!
Any and all help is much appreciated!
Explanation / Answer
for a u sub delta K for 1/2mv^2 and delta U for mgh = 0
then just solve for v.
so overall,
1/2mv^2 + mgh = 0 <-- solve for v