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प्रश्न
What is a centripetal force?
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उत्तर
Centripetal force: The force acting on a body moving in a circular path. It acts along the radius of the circle and towards its centre.
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संबंधित प्रश्न
Name the quality which is measured in eV
Name the quality which is measured in Wh.
1 kWh = ______ J.
State the condition when the work done by the force is positive
Justify the statement. “Power can be expressed as the product of force and velocity.”
State the practical unit mainly used in mechanical engineering and write down its equivalent in watt.
Calculate the work done when:
A car is moved on a rough road through 30 m against a frictional resistance of 75 N.
A coolie carrying a load on his head and moving on a frictionless horizontal platform does no work. Explain the reason why.
The world record for weight lifting was held by Sergei Didyk of the USSR. He lifted 261 kg to a height of 2.3 m in 4s; find:
(a) Weight lifted by him
(b) Work done by him
(c) Power developed by him. (g = 10m/s2)
