A flywheel is made up of steel ring 40mm thick and 200mm wide plate with mean diameter of 2 metres. If initially the flywheel is rotating at 300r.p.m. Find the time taken by the wheel in coming to rest due to frictional couple of 100N.m. Take mass density of the steel as 7900kg/m3. Neglect the effect of the spokes

A riveting machine is driven by a 4 kW motor. The moment of inertia of the rotating parts of the machine is equivalent to 140 kg-m2 at the shaft on which the flywheel is mounted. At the commencement of operation, the flywheel is making 240 r.p.m. If closing a rivet occupies 1 second and consumes 10 kN-m of energy, find the reduction of speed of the flywheel. What is the maximum rate at which the rivets can be closed?

Two parallel shafts whose centre lines are ‘5’ m apart, are connected by an open belt drive. The diameter of the larger pulley is ‘3’ m and that of smaller pulley ‘3’ m. The initial tension in the belt when stationary is ‘4’ kN. The coefficient of friction between the belt and the pulley is 0.3. Calculate the power transmitted, when the smaller pulley rotates at ‘700’ r.p.m. and length of the belt.

Two identical pulleys with diameter of 711 mm, are mounted on two parallel shafts for flat belt drive system. The maximum permissible tension in the belt is 2,691 N and the coefficient of friction between belt and pulley is 0.31. The centrifugal tension acting on the belt is 887 N. Calculate the power that can be transferred in Watts if the rotational speed of the driving pulley is 978 r.p.m.

A horizontal force P acts on the top of the 30 N block having a width of 25 cm and a height of 50 cm. If the coefficient of friction between the block and the plane is 0.33. a. What is the value of P for motion to impend? b. Is the motion will impend due to overturning? Show your solution.

A motor is attached to a pulley of radius 10 cm and mass 1 kg. A belt passes through the pulley that connects to a hollow sphere with a radius of 40 cm and a mass of 2 kg (see figure below). If the final speed of the first round, the angular speed of the SPHERE is 3πrad/s:a) What is the final energy consumption of the motor? b) If the torque is constant, what is the magnitude of the motor's torque? that there is no friction in the axes of the sphere and that all energy consumed by the motor is transformed into work.

A leather belt which is 125 mm wide and 6 mm thick, is used for transmitting power from a pulley. The diameter of the pulley is 750 mm and its angular speed is 500 rpm. The angle of lap is 150° and coefficient of friction is 0.3. If the mass of 1 m3 of leather is 1 kg and stress in the belt is not to exceed 2.75 MPa then find the maximum power that can be transmitted by the bel

A V-belt drives a pulley at a speed of 1440 m/min. The coefficient of friction between belt andpulley is 0.3, semi V-groove angle is 22.5o and angle of contact of belt with the pulley is 160o. Ifthe mass of the belt is 0.45 kg/m and if permissible pull in the belt is 800 N. Calculate the power.Consider the centrifugal tension in the belt.

A pulley system uses a flat belt of cross sectional area 500 mm2 and density 1300 kg/m3. The angle of lap is 165O on the smaller wheel. The coefficient of friction is 0.35. The maximum force allowed in the belt is 600 N. If the the diameter of the smaller wheel is 50 cm and rotates at 3850 rpm , determine Initial tension in the belts and Power transmitted.

Two pulleys, one 650 mm diameter and the other 400 mm diameter, on parallel shafts 1.5 m apart are connected by a flat belt. Find the length of the belt required and the angle of contact between the belt and each pulley. What power can be transmitted by the belt when the larger pulley rotates at 1200 rev/min, if the maximum permissible tension in the belt is 10 kN, and the coefficient of friction between the belt and pulley is 0.05? dont write handwritten solution.