A weston differential pulley block consists of a lower block and upper block. The upper block has two cogged grooves, one of which has a radius of 150 mm and the other a radius of 125 mm. If the efficiency of the machine is 50% calculate the effort required to raise a load of 1.5 kN.

← Prev Question Next Question →

1 Answer

Related questions

+1 vote

1 answer

In a weston differential pulley block, the number of recesses in the smaller wheel is 9/10 of that of the larger wheel. If the efficiency of the machine is 50%, find the load lifted by an effort of 300N.

asked Sep 25, 2022 in Machine Kinematics by Leo (38.0k points)

+1 vote

1 answer

It is planned to construct a four-bar mechanism ABCD with length AB= 60mm, BC = 100mm, CD = 70 mm and fixed link AD = 200 mm. If at least one link is required to have a complete rotation, this mechanism is

asked Sep 24, 2022 in Machine Kinematics by Leo (38.0k points)

+1 vote

1 answer

A machine raised a load of 360 N through a distance of 200 mm. The effort, a force of 60 N moved 1.8 m during the process. Calculate efficiency at this load.

asked Sep 24, 2022 in Machine Kinematics by Leo (38.0k points)

+1 vote

1 answer

In a lifting machine, the effort required to lift loads of 200N and 300N were 50N and 60N respectively. If the velocity ratio of the machine is 20 determine efficiency to load of 300 N.

asked Sep 24, 2022 in Machine Kinematics by Leo (38.0k points)

+1 vote

1 answer

In a lifting machine, the effort required to lift loads of 200N and 300N were 50N and 60N respectively. If the velocity ratio of the machine is 20 determine efficiency to load of 200 N.

asked Sep 24, 2022 in Machine Kinematics by Leo (38.0k points)

+1 vote

1 answer

On a machine efforts of 100 N and 160 N are required to lift the loads of 3000 N and 9000 N respectively. Find the law of the machine.

asked Sep 24, 2022 in Machine Kinematics by Leo (38.0k points)

+1 vote

1 answer

A machine raised a load of 360 N through a distance of 200 mm. The effort, a force of 60 N moved 1.8 m during the process. Calculate mechanical advantage.

asked Sep 25, 2022 in Machine Kinematics by Leo (38.0k points)

+1 vote

1 answer

A machine raised a load of 360 N through a distance of 200 mm. The effort, a force of 60 N moved 1.8 m during the process. Calculate velocity ratio.

asked Sep 24, 2022 in Machine Kinematics by Leo (38.0k points)

+1 vote

1 answer

A machine raised a load of 360 N through a distance of 200 mm. The effort, a force of 60 N moved 1.8 m during the process. Calculate effect of friction.

asked Sep 24, 2022 in Machine Kinematics by Leo (38.0k points)

+1 vote

1 answer

In a lifting machine, the effort required to lift loads of 200N and 300N were 50N and 60N respectively. If the velocity ratio of the machine is 20 determine maximum efficiency which can be expected from this machine.

asked Sep 24, 2022 in Machine Kinematics by Leo (38.0k points)

+1 vote

1 answer

For the same crank length and uniform angular velocity of the crank in an offset slider crank mechanism, if the connecting rod length is increased by 1.5 times, the velocity of piston will

asked Sep 24, 2022 in Machine Kinematics by Leo (38.0k points)

+1 vote

1 answer

In a wheel and differential axle, the diameter of the effort wheel is 400 mm. The radii of the load axles are 150mm and 100 mm respectively. The diameter of the rope is 10 mm. Find the load which can be lifted by an effort of 100 N, assuming an efficiency of the machine to be 75%.

asked Sep 25, 2022 in Machine Kinematics by Leo (38.0k points)

+1 vote

1 answer

Five pulleys are arranged in the second system of pulleys. When not loadwd the effort required to raise the movable block is 35N. Further wastage in friction increases the pull at the rate of 3% of the load lifted. What is the efficiency of the system at 2kN?

asked Sep 25, 2022 in Machine Kinematics by Leo (38.0k points)

+1 vote

1 answer

Four movable pulleys are arranged as in the first system. If the weight of each pulley is 5 N, calculate the effort which can lift a load of 10 kN.

asked Sep 24, 2022 in Machine Kinematics by Leo (38.0k points)

+1 vote

1 answer

In a single link robotic arm the end-effector slides upward along the link with a velocity of 0.5 m/s while the link rotates about revolute joint with an angular speed of 1 rad/sec. When the end-effector is at a distance of 1 m from the joint, the acceleration experienced by the end-effector will be

asked Sep 24, 2022 in Machine Kinematics by Leo (38.0k points)

+1 vote

1 answer

The lengths of the links of a 4- bar linkage with revolute pairs only are p,q,r and s units. Given that p < q < r < s and s+p < q+r which of these links should be the fixed one, for obtaining a ‘double crank’ mechanism?

asked Sep 25, 2022 in Machine Kinematics by Leo (38.0k points)

+1 vote

1 answer

In a slider-crank mechanism, the crank is rotating with an angular velocity of 20 rad/s in counterclockwise direction. At the instant when the crank is perpendicular to the direction of the piston movement, velocity of the piston is 2 m/s. Radius of the crank is

asked Sep 24, 2022 in Machine Kinematics by Leo (38.0k points)

+1 vote

1 answer

In a lifting machine, the effort required to lift loads of 200N and 300N were 50N and 60N respectively. If the velocity ratio of the machine is 20 determine effort loss in friction at 200 N.

asked Sep 24, 2022 in Machine Kinematics by Leo (38.0k points)

+1 vote

1 answer

In a lifting machine, the effort required to lift loads of 200N and 300N were 50N and 60N respectively. If the velocity ratio of the machine is 20 determine law of the machine.

asked Sep 24, 2022 in Machine Kinematics by Leo (38.0k points)

+1 vote

1 answer

Five pulleys are arranged in the second system of pulleys. When not loaded the effort required to raise the movable block is 35N. Further wastage in friction increases the pull at the rate of 3% of the load lifted. What is the effort required to raise a load of 2kN?

asked Sep 25, 2022 in Machine Kinematics by Leo (38.0k points)

+1 vote

1 answer

A Porter governor has equal arms each of length 250 mm and pivoted on the axis of rotation. Each ball has a mass of 5 kg and the central load has a mass on the sleeve of 25 kg. The radius of rotation of the ball is 150 mm when the governor begins to lift and 200 mm when the governor is at maximum speed. Neglecting friction at the sleeve, find the governor effort.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

+1 vote

1 answer

A Porter governor has equal arms each of length 250 mm and pivoted on the axis of rotation. Each ball has a mass of 5 kg and the central load has a mass on the sleeve of 25 kg. The radius of rotation of the ball is 150 mm when the governor begins to lift and 200 mm when the governor is at maximum speed. Considering friction at the sleeve of 10N, find the governor effort.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

+1 vote

1 answer

In a four-bar linkage, S denotes the shortest link length, L is the longest link length, P and Q are the lengths of other two links. At least one of the three moving links will rotate by 360^0 if

asked Sep 25, 2022 in Machine Kinematics by Leo (38.0k points)

+1 vote

1 answer

The number of links in a planer mechanism with revolute joints having 10 instantaneous centres is

asked Sep 24, 2022 in Machine Kinematics by Leo (38.0k points)

+1 vote

1 answer

A road roller has a total mass of 12 tonnes. The front roller has a mass of 2 tonnes, a radius of gyration of 0.4 m and a diameter of 1.2 m. The rear axle, together with its wheels, has a mass of 2.5 tonnes, a radius of gyration of 0.6 m and a diameter of 1.5 m. Calculate braking force required to bring the roller to rest from 9 km/h in 6 m on the level.

asked Sep 23, 2022 in Machine Kinematics by Leo (38.0k points)

...