Physics: Principles with Applications (7th Edition)

(a) $\tau = 40~m\cdot N$ (b) $\tau = 35~m\cdot N$
(a) $\tau = r\cdot F = (0.96~m)(42~N)$ $\tau = 40~m\cdot N$ (b) $\tau = r\cdot F ~sin(\theta)$ $\tau = (0.96~m)(42~N)~sin(60.0^{\circ})$ $\tau = 35~m\cdot N$