Laws of Motion questions
1031 published questions with worked solutions.
- A force of 100 dynes acts on a mass of 5 gram for 10 sec. The velocity produced is
- The engine of a car produces an acceleration of 4 m/s² in the car. If this car pulls another car of the same mass, what will be...
- The average resisting force that must act on a 5 kg mass to reduce its speed from 65 cm/s to 15 cm/s in 0.2 s is
- If a body of mass m is carried by a lift moving with an upward acceleration a, then the forces acting on the body are (i) the...
- A 10 kg stone is suspended with a rope of breaking strength 30 kg wt. The minimum time in which the stone can be raised through a...
- A machine gun fires 20 bullets per second into a target. Each bullet weighs 150 gm and has a speed of 800 m/sec. Find the force...
- In an air collision between an aeroplane and a bird, the force experienced by the bird as compared to that of the aeroplane is
- The linear momentum ρ of a body moving in one dimension varies with time according to the equation ρ = a + bt², where a and b are...
- A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring, and the spring reads 49 N when the lift...
- A bird weighs 2 kg and is inside a closed cage of mass 1 kg. If it starts flying, then what is the weight of the bird-and-cage...
- The time in which a force of 2 N produces a change in momentum of 0.4 kg-ms⁻¹ in a body is
- A block of mass m is resting on a smooth horizontal surface. One end of a uniform rope of mass m/3 is fixed to the block, which...
- A block of mass m is placed on a smooth wedge of inclination θ. The whole system is accelerated horizontally so that the block...
- A body of mass 0.05 kg is observed to fall with an acceleration of 9.5 ms⁻². The opposing force of air on the body is (g = 9.8...
- The mass of a lift is 2000 kg. When the tension in the supporting cable is 28000 N, then its acceleration is
- A rope of length 5 m is kept on a frictionless surface, and a force of 5 N is applied to one of its ends. Find the tension in the...
- A player caught a cricket ball of mass 150 gm moving at the rate of 20 m/sec. If the catching process is completed in 0.1 sec,...
- A human heart is pumping blood with a constant velocity v ms⁻¹ at the rate of M kg s⁻¹. The force required for this is (in N)
- A monkey of mass 20 kg is holding a vertical rope. The rope will not break when a mass of 25 kg is suspended from it, but it will...
- A man weighs 80 kg. He stands on a weighing scale in a lift which is moving upwards with a uniform acceleration of 5 m/s². What...
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