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please help with b 1. Your boss tells you to load a VERY heavy box onto a truck.

ID: 1321087 • Letter: P

Question


please help with b

1. Your boss tells you to load a VERY heavy box onto a truck. You and three of your friends try to lift it, but it doesn't budge. Remembering from physics class how pulleys can help in this situation, you rig up the following system (shown on left). Assume the pulleys are massless and frictionless. a. If the mass of the box is 1900 kg, what are the tensions T1 through T5 and force F needed to hold the box in place? b. What are the tensions T1 through T5 and force F needed to lift the box with an acceleration of 0.13 m/s^2?

Explanation / Answer


apply tensiion T = (mgLcos theta -a)

T = 1900 * 9.8 * 1 * cos (theta) - 0.13

there are too many unknowns to solve this furthur