Hi barnettlenworth, thank you for the comment. You're quite right that Netwtons times meters makes units of energy - Joules. However, it's nevertheless typical to write units of torque as $\textrm{N}\cdot \textrm{m}$ , and it's understood that since $\textrm{J}$ isn't used instead, that $\textrm{N}\cdot \textrm{m}$ represents torque.

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Calculate the net torque about the axle of the wheel shown in Fig. 8–42. Assume that a friction torque of 0.60 m⋅N0.60 \textrm{ m}\cdot\textrm{N}0.60 m⋅N opposes the motion.

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Calculate the net torque about the axle of the wheel shown in Fig. 8–42. Assume that a friction torque of $0.60 \textrm{ m}\cdot\textrm{N}$ opposes the motion.