In the diagram below, two identical blocks are connected via a massless string. The string is pulled across a pulley with negligible mass. The angle φ is equal to 60°. The portion of the string between the pulley and the block on the right is held horizontal. Initially, both blocks are at rest and the tension in the string is zero. The second block is then released and begins to swing downward. After it has swung through an angle θ = 20°, the first block begins to slide up the ramp. What is the coefficient of static friction µs between the block and the ramp?

Students are performing an experiment with the setup shown above, where a block of mass M sits on a horizontal table. The coefficient of kinetic friction between the block and the table is μk. The block is connected to a hanging object over a pulley. The pulley has negligible mass and friction. The string connecting the two is very light and does not stretch. The students add mass to the hanging object so that its mass is m, where m < M, and the block-hanging object system is released from rest. The hanging object falls for a distance h, at which point it collides with the ground and comes to rest. The block on the table keeps sliding and travels a total distance d before coming to rest. It does not reach the pulley, and d > h. A student creates a data table (see image) for the net force exerted on the block during the speeding up and slowing down portions of the experiment. (d) Does the block of mass M spend more time speeding up or slowing down? Justify your answer.

In the figure, a cord runs around two massless, frictionless pulleys. A canister with mass m = 41 kg hangs from one pulley, and you exert a force F on the free end of the cord. (a) What must be the magnitude of F if you are to lift the canister at a constant speed? (b) To lift the canister by 3.5 cm, how far must you pull the free end of the cord? During that lift, what is the work done on the canister by (c) your force (via the cord) and (d) the gravitational force? (Hint: When a cord loops around a pulley as shown, it pulls on the pulley with a net force that is twice the tension in the cord.) (a) Number i Units (b) Number i Units (c) Number Units (d) Number i Units

Joe, a carpenter with a weight of 600 N, is working on a scaffold. His young son Jack is helping him. Jack has a weight of 450 N.   The scaffold is held up by two ropes. One rope has an upward tension of 750 N. The weight of the scaffold is 400 N. What is the upward tension in the other rope?   Which below is correct? 700 N 850 N 1000 N 750 N

The m = 9.60 kg block in the figure(Figure 1) is held in place by the massless rope passing over two massless, frictionless pulleys. Figure T₂ T₁ T₁ m T3 T5 1 of 1 > Part A Find the tensions T₁ to T and the magnitude of force F. Enter your answers numerically separated by commas. Ψ— ΑΣΦ T1, T2, T3, T4, T5, F: = Submit Provide Feedback Request Answer Ć סי ? N

A 17 kg block rests on a 32 degree inclined frictionless surface and is attached by a light string to a 34 kg hanging mass where the string passes over a massless frictionless pulley. If g = 9.8 m/s^2 what is the tension in the connecting string?