When a source of sound is in motion towards a stationary observer then change in wave?
Correct answer: C. Increase in frequency of sound
- A. Increase in the velocity of sound
- B. Decrease in the velocity of sound
- C. Increase in frequency of sound
- D. Increase in both velocity and frequency of sound
Explanation
Option C is correct fA = (v/v - us) f fA > f So frequency will increase and wavelength will decrease
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Work transfers energy when a force causes displacement, while kinetic energy, gravitational potential energy and power describe motion, position and the rate of energy transfer. The work-energy theorem links net work with change in kinetic energy, and efficiency accounts for energy losses rather than treating them as energy destruction.
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