What is the efficiency of the pulley system, which lift a 1 tonne load a distance...
What is the efficiency of the pulley system, which lift a 1 tonne load a distance of 2m by the application of a force of 150 kg for a distance of 15 m?
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What is the efficiency of the pulley system, which lift a 1
tonne load a distance...
Problem (3) A motor M and a frictionless pulley-cable system are used to lift the 850...
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.
5. An electric lift can raise a 250.0 kg load a distance of 10.0 m in...
5. An electric lift can raise a 250.0 kg load a distance of 10.0 m in 2.5 s. What is the power of the lift? (10 points) 6.what is the velocity of a 8.00 kg bowling ball if its kinetic energy is 87.5J?(15points) 7.A 800 N box is pushed across a level floor for a distance of S.0 m with a force of 450 N. How much work was done on the box? (15points) 8. A horizontal force of 19.6...
6. Consider a power screw used in an application to lift a load. In the following, select a standard power screw, a...
6. Consider a power screw used in an application to lift a load. In the following, select a standard power screw, and determine: the torque to raise and lower the load, and the efficiency of the power screw. Use a friction factor of 0.15. (15 marks) a) Select an Acme screw thread ( 14.5°) to lift a load of 15,000 Ib, limiting the tensile strength to 8,000 psi b) Select a metric trapezoidal screw thread (= 15°) to lift a...
A pulley system is attached to a massless board as shown below. The board pivots only...
A pulley system is attached to a massless board as shown below.
The board pivots only at the pivot point. A 10 kg mass M sits
exactly in the middle of the board. If the angle is 30°, what is
the force necessary to lift the 10 kg mass?
46. A pulley system is attached to a massless board as shown below. The board pivots only at the pivot point. A 10 kg mass M sits exactly in the middle...
Near the surface of the Earth, a student is using a simple pulley to lift a...
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...
using figure 1 and information below find the forces and power needed to move the elevator(lift)....
using figure 1 and information below find the forces and power
needed to move the elevator(lift).
needed answers are:
1 finding the service loads
2 mechanical analysis to the shaft
3 power the motor required to move the system.
Project Introduction The system to be designed is a lifting system (elevator) for people located in a building using an electric drive system. There is one car that needs to be lifted as high as 15 metres. The arrangement of the...
A house painter uses the chair and pulley arrangement of the figure to lift himself up...
A house painter uses the chair and pulley arrangement of the figure to lift himself up the side of a house. The painter's mass is 75 kg and the chair's mass is 9.0 kg . With what force must he pull down on the rope in order to accelerate upward at 0.23 m/s^2 ?
As shown, a frictionless pulley hangs from a system of springs and a cable. The pulley...
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...
A 12 kg load hangs from one end of a rope that passes over a small...
A 12 kg load hangs from one end of a rope that passes over a small frictionless pulley. A 15 kg counterweight is suspended from the other end of the rope. The system is released from rest. a) Calculate the tension force in the rope. b) What distance does the 12 kg move in the first 3 seconds? c) What is the velocity of 15 kg mass at the end of 5 seconds?
Please show work! A pulley of negligible mass is attached to a block weighing 504 N. A person uses the rope and pulley s...
Please show work!
A pulley of negligible mass is attached to a block weighing 504
N. A person uses the rope and pulley system illustrated in the
figure to lift the block at a constant velocity. The pulleys and
rope are all ideal.
F_G=____________ ?
A. Draw the free body diagram for the block. (Observe that three
are two rope segments pulling on the block.)
B. Apply Newton's first law and determine the tension in the
rope, and thus, the...
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.
5. An electric lift can raise a 250.0 kg load a distance of 10.0 m in 2.5 s. What is the power of the lift? (10 points) 6.what is the velocity of a 8.00 kg bowling ball if its kinetic energy is 87.5J?(15points) 7.A 800 N box is pushed across a level floor for a distance of S.0 m with a force of 450 N. How much work was done on the box? (15points) 8. A horizontal force of 19.6...
6. Consider a power screw used in an application to lift a load. In the following, select a standard power screw, and determine: the torque to raise and lower the load, and the efficiency of the power screw. Use a friction factor of 0.15. (15 marks) a) Select an Acme screw thread ( 14.5°) to lift a load of 15,000 Ib, limiting the tensile strength to 8,000 psi b) Select a metric trapezoidal screw thread (= 15°) to lift a...
A pulley system is attached to a massless board as shown below.
The board pivots only at the pivot point. A 10 kg mass M sits
exactly in the middle of the board. If the angle is 30°, what is
the force necessary to lift the 10 kg mass?
46. A pulley system is attached to a massless board as shown below. The board pivots only at the pivot point. A 10 kg mass M sits exactly in the middle...
using figure 1 and information below find the forces and power
needed to move the elevator(lift).
needed answers are:
1 finding the service loads
2 mechanical analysis to the shaft
3 power the motor required to move the system.
Project Introduction The system to be designed is a lifting system (elevator) for people located in a building using an electric drive system. There is one car that needs to be lifted as high as 15 metres. The arrangement of the...
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...
Please show work!
A pulley of negligible mass is attached to a block weighing 504
N. A person uses the rope and pulley system illustrated in the
figure to lift the block at a constant velocity. The pulleys and
rope are all ideal.
F_G=____________ ?
A. Draw the free body diagram for the block. (Observe that three
are two rope segments pulling on the block.)
B. Apply Newton's first law and determine the tension in the
rope, and thus, the...
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