Question:
A pendulum bob of mass $50 \mathrm{~g}$ is suspended from the ceiling of an elevator. Find the tension in the string if the elevator (a) goes up with acceleration $1.2 \mathrm{~m} / \mathrm{s}^{2}$, (b) goes up with deceleration $1.2 \mathrm{~m} / \mathrm{s}^{2}$, (c) goes up with uniform velocity, (d) goes down with acceleration $1.2 \mathrm{~m} / \mathrm{s}^{2}$, (e) goes down with deceleration $1.2 \mathrm{~m} / \mathrm{s}^{2}$ and (f) goes down with uniform velocity.
Solution:
