The solid fuel propellant pushes the rocket off the ground at an initial velocity of 200 feet per second. So, without initial velocity rocket can't go upward.

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A force which acts on a body moving in a circular path and is directed towards the centre around which the body is moving. The magnitude of the centripetal force on an object of mass m moving at tangential...

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When salt is dissolved in water, as it is in ocean water, that dissolved salt adds to the mass of the water and makes the water denser than it would be without salt. Because objects float better on a dense...

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It is difficult to hold a school bag having a strap made of thin and strong string, because the thin string has very less contacting area in case of a school bag having a strap made of thin and strong...

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A blunt knife edge will present a greater surface area to the apple than a sharp knife would. So the same force is distributed over a larger area, and the pressure on the apple skin is a lot lower.

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Please visit http://courses.chem.psu.edu/chem451/lecture16b_simplemix_large_s04.pdf

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kinetic energy directly proportional to velocity, as mass of body is constant. k ~ v2 16k ~ (4v)2 so, velocity increases 4 times. And so as momentum.

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