A 5g apple is thrown straight upward with an initial velocity of 20 m/s @ a point of 1.5m height from ground. Ignoring air friction, find: a. Total mechanical energy of the...

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A boy pulls a 10.0 kg book rack at rest on a smooth floor with a constant horizontal force of 1.2N starting from rest. Compute the change in kinetic energy of the box after the...

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if the average kinetic energy of a substance changes, a. its temperture changes b. it may change phase c. thermal energy has been transferred into or...

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Suppose at P point, a body loses its entire K.E which it had at O point and at Q point body losses 1/3 of its K.E which is at has at O. Find out the height h.

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A 15-g CD with a radius of 7.5 cm rotates with an angular speed of 40 rad/s. What is its kinetic energy?