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संबंधित प्रश्न
Name a common device where a gear train is used
A girl weighing 400 N climbs a vertical ladder. If the value of g be 10 m s−2, the work by her after climbing 2 m will be :
The velocity of a car increases from 54 km/hr to 72 km/hr. How much is the work done if the mass of the car is 1500 kg?
What is the work done against gravity when a body is moved horizontally along a frictionless surface?
Give an example
Electrical energy changes to heat energy.
A man climbs a slope and another walks same distance on level road. Which of the two expends more energy and why?
A water pump raises 50 kg of water through a height of 25 m in 5s. Calculate the power supplied by the pump (Take: g = 10 N kg−1).
A man squatting on the ground gets straight up and stand. The force of reaction of ground on the man during the process is ______.
