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

A 55kg mass is projected vertically with and initial speed of 30m/sec

a) what is original kinetic energy

b) What is kinetic E after 4.5 seconds

c) What is chg in gravitational potential E in these 4.5seconds?

2. Relevant equations

W=mv^{2}/2

W=(m/2)(gt)^{2}

W=mgh

3. The attempt at a solution

a) Original =(55)(30)^{2}/2

b) W=(m/2)(gt)^{2}

=(55/2)[(9.8)(4.5)]^{2}

c) W=mgh

=(55)(9.8)h

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# Homework Help: Kinetic E & Potential E Question

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