You have a ball in your hand above the ground at rest which you then drop. What energy is involved in each part of this situatio
n and how do we know that total mechanical energy has been conserved? Explain with and without air resistance present.
1 answer:
When you hold the ball, you have potential energy, when you drop the ball, you have kinetic.
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Answer:
First let's find the work.
Work = Force*Displacement
= 20*5
= 100 Joules
Power = Work/Time
= 100/4
= 25 Watts
KE=1/2mv^2
KE=1/2x0.95x3=1.425
Speed is constant. 50 miles = 1 hour. 600/50 = 12. 1hr(12) = 12 hours.
Answer:
A, C, and D
Explanation:
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