The mass of the Earth is 5.98 × 1024 kg.A 3.87 kg bowling ball initially at rest isdropped from a height of 4.76 m.The acceleration of gravity is 9.8 m/s2. What is the speed of the Earth coming upto meet the ball just before the ball hits theground?

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A: initial velocity = u Height os ceiling of arena above the floor (h) = 77 m

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Q: Io, a satellite of Jupiter, is the most volcanically active moon or planet in the solar system. It…

A: Acceleration due to gravity on lo (g') = 1.81 ms2Let the mass of fragment = m

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Q: A box is thrown (at an unknown angle) with a speed of 17.8 m/s from the top of a 28.4 m high cliff.…

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A: the total energy must be constant. Hence,

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Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.