(7) Determine the required horizontal force P that the worker must exert on the rope to position the 50 kg crate at rest directly above the center of the trailer. Ans: 126.6 N 1 m 4 m 2 m

12. Find the torque on a bolt when a force of 290 N is applied on a wrench 33 cm from the bolt, at an angle of 77° to the wrench. Ans:

A sheet of water of uniform thickness (h = 0.03 m) flows from the device shown in the figure below. The water enters vertically through the inlet pipe and exits horizontally with a speed that varies linearly from 0 to 11 m/s along the 0.2-m length of the slit. Determine the y component of anchoring force necessary to hold this device stationary. FAY = 0 m/s- i 0.2m 0.03m N 11m/s