- #1
Cind20
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1. A projectile of mass 50 kg moving horizontally at 100m/s explodes into three pieces. Two pieces fly off vertically while a third continues horizontally at 150m/s (neglect gravity).
What is the kinetic energy of the horizontally moving piece?
2. Homework Equations
KE=(1/2)mv^2
W=∆KE
W+KEi + PEi =KEf + PEf
PE=mgh
3. The Attempt at a Solution
W=∆KE
=(1/2)mvf^2-(1/2)mvi^2
But I got incorrect answer. The correct answer is 375000 J
What is the kinetic energy of the horizontally moving piece?
2. Homework Equations
KE=(1/2)mv^2
W=∆KE
W+KEi + PEi =KEf + PEf
PE=mgh
3. The Attempt at a Solution
W=∆KE
=(1/2)mvf^2-(1/2)mvi^2
But I got incorrect answer. The correct answer is 375000 J