Work, Energy and Power questions
712 published questions with worked solutions.
- The rain drop of mass 1 g, starts with zero velocity from a height of 1 km. It hits the ground with a speed of 5 m/s. The work...
- A three coulomb charge moves from the point (0,−2,−5) to the point (5,1,2) in an electric field expressed as E=2x i+3y^2 j+4 k...
- Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional force are 10% of the...
- A force (3x² + 2x − 5) N displaces a body from x = 2 m to x = 4m. Work done by this force is ............J.
- A particle of mass m moves on a straight line with its velocity increasing with distance according to the equation v = x, where α...
- A ball suspended by a thread swings in a vertical plane so that its magnitude of acceleration in the extreme position and lowest...
- The potential energy function (in J) of a particle in a region of space is given as U = (2x² + 3y² + 2z). Here x, y and z are in...
- A body of mass 2 kg begins to move under the action of a time dependent force given by F = (6t i + 6t^2 j) N. The power developed...
- An artillery piece of mass M₁ fires a shell of mass M₂ horizontally. Instantaneously after the firing, the ratio of kinetic...
- A body of mass 'm' dropped from a height 'h' reaches the ground with a speed of 0.8 gh . The value of workdone by the...
- An engine is attached to a wagon through a shock absorber of length 1.5 m. The system with a total mass of 40,000 kg is moving...
- A boy is rolling a 0.5 kg ball on the frictionless floor with the speed of 20 ms ^ -1 . The ball gets deflected by an obstacle on...
- A ball of mass 4 kg, moving with a velocity of 10 ms^ -1 , collides with a spring of length 8 m and force constant 100 Nm^ -1 ....
- A constant power delivering machine has towed a box, which was initially at rest, along a horizontal straight line. The distance...
- A bullet of mass 0.1 kg is fired on a wooden block to pierce through it, but it stops after moving a distance of 50 cm into it....
- If the Kinetic energy of a moving body becomes four times its initial Kinetic energy, then the percentage change in its momentum...
- A body at rest is moved along a horizontal straight line by a machine delivering a constant power. The distance moved by the body...
- A porter lifts a heavy suitcase of mass 80 kg and at the destination lowers it down by a distance of 80 cm with a constant...
- Two solids A and B of mass 1 kg and 2 kg respectively are moving with equal linear momentum. The ratio of their kinetic energies...
- An automobile of mass 'm' accelerates starting from origin and initially at rest, while the engine supplies constant power P. The...
Other chapters
Alcohols, Phenols and EthersAldehydes, Ketones and Carboxylic AcidsAlternating CurrentAminesAnatomy of Flowering PlantsAncient Indian HistoryAnimal KingdomApplication of DerivativesArea Under CurveAromatic Compounds and Aryl HalidesAtomsBasic Mathematics and LogarithmBinomial TheoremBiodiversity and ConservationBiological ClassificationBiomoleculesBiotechnology and Its ApplicationsBiotechnology: Principles and ProcessesBody Fluids and CirculationBreathing and Exchange of GasesCell Cycle and Cell DivisionCell: The Unit of LifeChemical Bonding and Molecular StructureChemical Coordination and Integration