Question

A person is performing a bicep curl, as shown in the picture above, with the forearm/dumbbell perfectly horizontal. The combined mass of the forearm and dumbbell is 12 kg, which

is acting at the centre of mass a horizontal distance of 27cm away. What is-the magnitude of the moment produced by the weight of the forearm/dumbbell? Expreşs your answer in N*m to one decimal place (answer should be positive number) and do not include units.

Fig: 1

Fig: 2

Fig: 3