Work, Energy and Power questions
712 published questions with worked solutions.
- A body of mass 0.4 kg is whirled in a vertical circle making 2 rev/s. If the radius of the circle is 2 m, then the tension in the...
- The string of a pendulum of length l is displaced through 90^ from the vertical and released. The minimum strength of the string,...
- The maximum and minimum tensions in a string whirling a particle in a circle of radius 2.5 m with constant speed are in the ratio...
- A particle rests on top of a smooth hemisphere of radius R. Find the smallest horizontal velocity that must be imparted to it if...
- A stone is tied to one end of a 5 m long string and whirled in a vertical circle. The minimum speed required to just cross the...
- The string of a pendulum of length l is displaced through 90^ from the vertical and released. The minimum strength of the string,...
- A body of mass m tied to a string is moved in a vertical circle of radius r. The maximum and minimum tensions in the string are...
- A bucket tied at the end of a 1.6 m long string is whirled in a vertical circle with a constant speed. The minimum speed at which...
- A body crosses the topmost point of a vertical circle with the critical (minimum) speed. What will be its acceleration when the...
- A mass of 5 kg is whirled in a vertical circle of radius 2 m with a speed of 6 m/s. The maximum tension in the string is
- A body of mass 5 kg is whirled in a vertical circle by a string 1 m long. Calculate the velocity at the top of the circle for...
- A stone of mass 1 kg tied to a light inextensible string of length L = 10 3 m is whirling in a circular path of radius L in a...
- A body of mass m tied to a string is moved in a vertical circle of radius r. The difference in the tensions at the lowest point...
- A sphere is suspended by a thread of length l. The minimum horizontal velocity that has to be imparted to the sphere for it to...
- A body slides down a frictionless track which ends in a circular loop of diameter D. The minimum height h of the body (above the...
- A body of mass 2 kg attached to a string is whirled in a vertical circle of radius 5 m. The minimum speed of the body at the...
- A body of mass 1 kg is moving in a vertical circular path of radius 1 m. The difference between the kinetic energies at its...
- The bob of a pendulum of mass m and length L is displaced 90^ from the vertical and gently released. In order that the string may...
- **Statement 1:** For looping a vertical loop of radius r, the minimum velocity at the lowest point should be 5gr . **Statement...
- A small cone filled with water is revolved in a vertical circle of radius 4 m, and the water does not fall down. What must be the...
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