Work, Energy and Power questions
712 published questions with worked solutions.
- 300 joule of work is done in sliding up a 2 kg block on an inclined plane to a height of 10 metres. Taking value of acceleration...
- A spring of spring constant 5 × 10³ N m⁻¹ is stretched initially by 5 cm from the unstretched position. Then the work required to...
- A body moves from a position **r₁** = (2î − 3ĵ − 4k̂) m to a position **r₂** = (3î − 4ĵ + 5k̂) m under the influence of a...
- A body moves a distance of 10 m along a straight line under the action of a 5 N force. If the work done is 25 J, the angle...
- The potential energy of a certain spring when stretched through a distance s is 10 J. The amount of work done (in joule) that...
- A particle acted upon by constant forces (4î + ĵ − 3k̂) N and (3î + ĵ − k̂) N is displaced from the point (î + 2ĵ + 3k̂) m to the...
- A bullet of mass 10 g is fired horizontally with a velocity 1000 ms⁻¹ from a rifle situated at a height 50 m above the ground. If...
- A body constrained to move in the y-direction is subjected to force **F** = (2î + 15ĵ + 6k̂) N. The work done by this force in...
- The area under the displacement–force curve gives
- A ball is released from the top of a tower. The ratio of work done by the force of gravity in the first, second and third second...
- A uniform chain of length 2 m is kept on a table such that a length of 60 cm hangs freely from the edge of the table. The total...
- Two springs have their force constants as k₁ and k₂ (k₁ > k₂), when they are stretched by the same force. [BITSAT 2007]
- A bucket full of water weighs 5 kg; it is pulled up from a well 20 m deep. There is a small hole in the bucket through which...
- When a force is applied on a moving body, its motion is retarded. Then the work done is [WB-JEE 2007]
- A force of (5+3x) N acting on a body of mass 20 kg along the x-axis displaces it from x = 2 m to x = 6 m. The work done by the...
- Under the action of a force F = Cx, the position of a body changes from 0 to x. The work done is
- A rod AB of mass 10 kg and length 4 m rests on a horizontal floor with end A fixed so as to rotate it in a vertical plane about a...
- If the normal reaction is R and the coefficient of friction is μ, what is the work done against friction in moving a body by a...
- A spring of force constant 800 N m⁻¹ has an extension of 5 cm. The work done in extending it from 5 cm to 15 cm is
- A spring with spring constant k is extended from x = 0 to x = x₁. The work done will be
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