he tailgate of car is supported by the hydraulic lift BC. If the lift exerts a 1

Question

he tailgate of car is supported by the hydraulic lift BC. If the lift exerts a 125 lb force directed along centerline on the ball and socket at B (force is directed along CB and pushing on BD a. termine the moment about Musing the perpendicular distance between the force and A b. Determine the about using the components of the force. Determine the moment about Aby moving the force to point D (Dison the line of action of the d. force) 12slbforce) about Determine the force required to create the same moment (found from the if the lift is now a point E, which is 15 in. from A in the horizontal direction. 20.5 in. 4.38 in 7.62 in. 17.2 in.

Explanation / Answer

dcb=(344)2+(152.4)2=376.25mm

cos=344/376.25

sin=152.4/376.25

Fcb=(Fcb cos)i(-Fcbsin)j

=125/376.25mm(344mm)i+(152.4mm)j

now, MA=rB/A*Fcb

where rB/A=(410mm)i-(87.6mm)j

therefore, MA=(30.770 mm)k

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