Doppler Effect & Work, Energy, Power

Question 1

Definition: Doppler Effect

Answer 1

The change in frequency of the sound detected by the listener, because the sound source and the listener have different velocities relative to the medium of sound propagation

Question 2

Work done on an object by a constant force F

Answer 2

Is FΔxcosθ, where F is the magnitude of the force, Δx is the magnitude of displacement and θ the angle between the force and displacement

Question 3

Work Energy Theorem

Answer 3

The work done by an object by a net force is equal to the change in the objects kinetic energy

Question 4

Conservative Force

Answer 4

is a force in which the work done in moving an object between 2 points is independent of the path taken

Question 5

Non-conservative Force

Answer 5

Is a force in which the work done in moving an object between 2 points is dependent on the path taken

Question 6

Principle of conservation of mechanical energy

Answer 6

The total mechanical energy (sum of the potential and kinetic energy) remains constant in an isolated system

Question 7

Power

Answer 7

The rate at which work is done