As seen in Fig. 7-5, a jackscrew has a lever arm of 40 cm and a pitch

Question:

As seen in Fig. 7-5, a jackscrew has a lever arm of 40 cm and a pitch of 5.0 mm. If the efficiency is 30 percent, what horizontal force F applied perpendicularly at the end of the lever arm is required to lift a load F_W of 270 kg? 5.0 mm Fw W 40 cm Fig. 7-5