While testing a wheat thresher at recommended throughout, 80 Nm torque is recorded at 750 rpm at the main shaft of the threshing cylinder, which is operated by a 200-mm diameter V pulley. The overload factor and unit mass of V-belt are 1.2 and 0.9 kg/m respectively. At condition of maximum power transfer the maximum tension in V-belt in N is ________
a) 166.55 N
b) 233.78 N
c) 120.06 N
d) 211.23 N

Answer: a
Explanation: N = 750 rpm
V = \(\frac{π*0.2*750}{60}\) = 7.854 m/s
M = 0.9 kg/m
T_c = mv² = 0.9 * (7.854)²
T_c = 55.5165 N
At maximum power transmission
T_max = 3 T_c
T_max = 3 * 55.5165 = 166.55 N