What is the Kinetic Energy of a tennis ball after 40.0cm of freefall?
1 answer:
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Explanation:
✠ This question says that there is an object and its mass is 2 kg ; it's raised to a height 10 m and possess potential energy of 200 J. Now this question ask us to find the kinetic energy and the potential energy at a height 4 metre.
✰ Mass = 2 kilograms
✰ Raised height = 10 metres
✰ Posses potential energy = 200 Joules
✰ Kinetic energy at a height 4 metre
✰ Potential energy at a height 4 metre
✰ Kinetic energy at a height 4 metre = 120 J
✰ Potential energy at a height 4 metre = 80 J
✰ Potential energy formula.
✰ Potential energy = mgh
✰ Potential energy as P.E
✰ Mass as m
✰ Joules as J
✰ Height as h
✰ Raised height as g
↦ Potential energy = mgh
↦ Potential energy = 2 × 10 × 4
↦ Potential energy = 20 × 4
↦ Potential energy = 80 J
<h3>✠ Now according to the question let us find the kinetic energy</h3>↦ Kinetic energy = Posses potential energy - Finded potential energy
↦ Kinetic energy = 200 J - 80 J
↦ Kinetic energy = 120 Joules
Answer:
77647
Explanation:
= Efficiency = 34%
Power used in 1 home = 0.02 MW
Total power is
Waste of power
Number of homes would be given by
The number of homes that could be heated with the waste heat of this one power plant is 77647