The pulley system shown in the figure is used to lift a 52-kg crate. Note that one chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. Assume the masses of the chains, pulleys, and ropes are negligible. Determine the force \(\vec{F}\)
required to lift the crate with constant speed, determine the tension in the upper chain, and determine the tension in the lower chain.
In the figure a worker lifts a weight
by pulling down on a rope with a force . The upper pulley is attached to the ceiling by a
chain,and the lower pulley is attached to the weight by another
chain.The weight is lifted at constant speed. Assume that the
rope,pulleys, and chains all have negligible weights.
A) In terms of ,find the tension in the lower chain.
B) In terms of ,find the tension in upper chain.
C) In terms...
What is the magnitude of force F that is required to keep the
following system in equilibrium. assume the rope has negligible
mass and that the pulleys are frictionless. each pulley in the
system has a mass of 20kg with a 300 kg crate
300 Kg
Near the surface of the Earth, a student is using a simple pulley to lift a crate of mass M = 30 kg from rest to a height H by pulling on the rope with a constant force F as shown in the figure. If the breaking strength of the rope is 400 N, what is the minimum time (in s) required for the student to haul the crate to a height H = 20 m? (Assume that the pulley...
In the pulley system shown in Figure P2.33, assume that the cable is massless and inextensible, and assume that the pulley masses are negligible. The force f is a known function of time. Derive the system's equation of motion in terms of the displacement. For the system shown in Figure P2.34, the solid cylinder of inertia I and mass m rolls without slipping. Neglect the pulley mass and obtain the equation of motion in terms of x.
Problem (3) A motor M and a frictionless pulley-cable system are used to lift the 850 lb crate shown at a constant acceleration. The motor has an efficiency of E = 0.6 and the input power to it is 92 hp at the instant when the load has been hoisted s = 15 ft starting from rest. Determine the tension force in the cable. Neglect the mass of the pulleys and cable.
A pulley system is attached securely to the corner of a ceiling and connects to masses M_1 and M_2 as shown. Atop M_2 sits another mass, M_3. Mass M_1 rests on a 60 degree incline, while masses M_2 and M_3 are on a 25 degree incline. The coefficient of kinetic friction between the masses and the inclines is mu_k = 0.25, while the coefficient of static friction between M_2 and M_3 is mu_s = 0.70. If M_2 = 1.20 kg...
In the figure, a cord runs around two massless, frictionless
pulleys. A canister with mass m = 42 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 4.0 cm, how far must you pull
the free end of the cord? During that lift, what is the...
Problem#6 A system comprising blocks, a light frictionless pulley, a frictionless incline, and connecting ropes is shown in the figure. The 9.0-kg block accelerates downward when the system is released from rest. The tension in the rope connects the 6.0-kg block and the 4.0-kg block. (a) Draw the free body diagrams (b) Find the tension in the rope (c) Find the reaction of the incline surface on each block rn +1 30° 10-9
Problem#6 A system comprising blocks, a light...
As shown, a frictionless pulley hangs from a system of
springs and a cable. The pulley is equidistant between the two
supports attaching the springs to the ceiling. The distance between
the supports is d=1.50 m . The cable cannot stretch and its length
between the two springs is 1.8 m.
(figure 1)
(FIgure 2)
A)As shown, a mass is hung from the pulley. This mass causes a
tensile force of 17.0 N in the cable and the pulley to...