Suppose wave pulses in an aquarium are produced by a mechanical motor that moves a bob up and down at the surface. The setup use
s a 10-W motor and has a period of 1.9 s between bobs. How much kinetic energy is in each pulse.
1 answer:
Answer:
kinetic energy in each pulse = 9.5J
Explanation:
- The concept used here is that of work, energy and power.
- Work = energy in this case
- but Power = 10W and t = 1.9s
- Energy E = 10W x 1.9s = 19J
Conventionally, overall energy = kinetic + potential
Hence kinetic energy in each pulse = half of the total energy = 0.5 x 19
energy = 9.5J
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