(a) Write the mathematical expression for torque and state its physical meaning.
(b) Write the mathematical expression for mechanical work and state its physical meaning.
(c) Show that torque is a vector quantity whereas work is a scalar quantity.
(d) Angular momentum is defined as L=r×p. Classify angular momentum and state its SI unit.
(e) Pressure is defined as normal force per unit area. Discuss whether pressure is a scalar or a vector and justify your answer.