Work, Energy and Power questions
712 published questions with worked solutions.
- A ball is released from the top of a tower. The ratio of work done by the force of gravity in the 1st second, 2nd second and 3rd...
- A ship weighing 0.3 × 10⁸ kg-wt is pulled by a force of 0.5 × 10⁵ N through a distance of 3 m. If the ship were originally at...
- The momentum of a body increases by 20%. The percentage increase in its kinetic energy is
- A uniform force of 4 N acts on a body of mass 10 kg for a distance of 2.0 m. The kinetic energy acquired by the body is
- A man throws a piece of stone to a height of 12 m where it reaches with a speed of 12 ms⁻¹. If he throws the same stone such that...
- A body of mass 4 kg is moving with momentum of 8 kg-ms⁻¹. A force of 0.2 N acts on it in the direction of motion of the body for...
- In the non-relativistic regime, if the momentum is increased by 100%, the percentage increase in kinetic energy is
- A glass ball is dropped from height 10 m. If there is 20% loss of energy due to impact, then after one impact the ball will go up...
- A body of mass 2 kg is thrown up vertically with kinetic energy of 490 J. The height at which the kinetic energy of the body...
- A 3 kg body is dropped from the top of a tower of height 135 m. If g = 10 ms⁻², then the kinetic energy of the body after 3 s...
- A body of mass M is dropped from a height h on a sand floor. If the body penetrates x cm into the sand, the average resistance...
- At a certain instant, a body of mass 0.4 kg has a velocity of (8î+6ĵ) ms⁻¹. The kinetic energy of the body is
- A machine which is 75% efficient, uses 12 J of energy in lifting up a 1 kg mass through a certain distance. The mass is then...
- The kinetic energy K of a particle moving in a straight line depends upon the distance s as K = as². The force acting on the...
- A rectangular plank of mass m₁ and height a is kept on a horizontal surface. Another rectangular plank of mass m₂ and height b is...
- The energy required to accelerate a car from rest to 10 ms⁻¹ is E. What energy will be required to accelerate the car from 10...
- In the stable equilibrium position, a body has
- The potential energy of a particle of mass 5 kg moving in the x–y plane is given by U = (−7x+24y) J, x and y being in metre....
- The potential energy as a function of the force between two atoms in a diatomic molecule is given by U(x) = a/x¹² − b/x⁶, where a...
- Two springs A and B are stretched by applying forces of equal magnitude at the four ends. If the spring constant of A is 2 times...
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