(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Question: An airplane is 250m from the zero heigh and drops a package:

a. What is the objects kinetic energy if the velocity is moving at 10m/s. How much energy is left? What height should the object be at?

b. What is the objects kinetic energy if the velocity is 30m/s? How much energy is left? What height should the object be at?

2. Relevant equations

KE=.5mv^2

PE=mgh

mgh(initial)+mv(initial)^2=mgh(final)+.5mv(final)^2 (I am not sure if this equation is relevant but it might be so I thought I put it down)

3. The attempt at a solution

a. KE=.5(75)(10^2)=3750 J

I have no idea how to find how much energy is left. Is there an equation for this/

h=3750/75x9.81=5.1m

b. KE=.5(75)(30^2)=33750 J

Again I don't know how to find the amount of energy left over.

h=33750/75x9.81=5.1m

Also I don't understand what the 250m is there for but I guess it may have something to do with the amount of energy left.

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# Homework Help: Questions on conservation of energy

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