A wrench with a length of #24 cm# is used to unscrew a #5/2 cm# bolt. If a torque of #5 Nm# is needed to overcome the friction keeping the bolt in place, what is the minimum torque that must be applied to the wrench to unscrew the bolt?

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Answer 1 · 2017-11-16T10:48:41

#vec \tau=vec r\timesvec F; \qquad \tau = r.F.sin90^0=r.F#
#r=0.24m; \qquad \tau = 5# #N.m; \qquad F=\tau/r = 21# #N#