In a wheel and axle machine the radii of the wheel and axle are 0.5 m and 0.05 m,respectively . A weight of 100 kg is raised when it is hanging by a rope from the axle by applying a force of 12 kg on the circumference of the wheel . Find the mechanical advantage, velocity ratio and efficiency of this machine.

The radii of the axle and the wheel are increased by 3 times and 5 times, respectively. The new M.A. advantage of the wheel and axle is

A chain couples and rotates two wheels in a bicycle . The radii of bigger and smaller wheels are 0.5 m and 0.1 m respectively . The bigger wheel rotates at the rate of 200 rotations per minute , then the rate of rotation of smaller wheel will be :-

Two wheel and axle systems P and Q are connected as shown in the figure. The radii of wheels and axles of P and Q are 20 cm, 27 cm, 3 cm and 5 cm, respectively. If L = 540 kgwt, find E.

The angular velocity of a rickshaw wheel is 70 rads^-1 . If !he radius of the wheel is 0.5 m, the linear velocity is

The angular velocity of a wheel is 70 rad//sec . If the radius of the wheel is 0.5 m , then linear velocity of the wheel is

The angular velocity of a wheel is 70 rad//sec . If the radius of the wheel is 0.5 m , then linear velocity of the wheel is

A fly wheel is rotating at a speed of 160 r.p.m. whose weight is 20 kg and its centre of mass at a distance of 0.01 m from the axis of rotation. Calculate : moment of inertial of the fly wheel.

A fly wheel is rotating at a speed of 160 r.p.m. whose weight is 20 kg and its centre of mass at a distance of 0.01 m from the axis of rotation. Calculate : the energy stored in the fly wheel.

A cord is wound around the circumference of a wheel of diameter 0.3 m. The axis of the wheel is horizontal. A mass of 0.5 kg is attached at the end of the cord and it is allowed to fall from rest. If the weight falls 1.5 m in 4s, what is the angular acceleration of the wheel ? Also find out the moment of inertia of the wheel.

Fig. shows a uniform disc of mass 1 kg and radius 0.2 m mounted on an axle supported in fixed frictionless bearings. A light string is wrapped around the rim of the wheel. A constant downwards pull of 2 kg wt. is exerted on the string. What is the angular acceleration of the wheel and the tangential acceleration of a point on the rim ?