(a) Define mechanical work and write the mathematical expression for the work done by…
PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
(a) Define mechanical work and write the mathematical expression for the work done by a constant force that makes an angle θ with the direction of displacement.
(b) State the exact ranges of θ (in degrees) for which the work done is positive, zero and negative.
(c) Is work a scalar or a vector quantity? Give one reason for your answer.