Since the initial potential energy and final kinetic energy are zero, our equation now becomes EP,f = EK,i. We can then substitute the formula for kinetic energy,  EK = 1/2mv2,  and the formula for gravitational potential energy,  EP = mgh, mghf = 1/2mvi2. Now it's just a matter of doing the algebra, solving for the final height  hf,  and substituting values to find  hf.  Notice that the mass m divides out of both sides of the equation, so the value of the mass is not needed to find the final height. Calculate the maximum height of the ball in meters. hf = __________ m

Q: dv -vW, dw vw – kw +

A: On solving LHS and RHS separately: LHS: RHS: Thus LHS and RHS are equal only if I=1/at

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Q: Calculate a light-year in [a] km and [b] Mile

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Q: If v = (2, 2) and w = (1, –1) , what is |v+ 2w| ? %3D

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Q: Given A= (-3i+7j-4k) B= (6i-10j+9k), calculate A X B.

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Relativistic Energy and Momentum

According to classical physics, time flow is the same for every observer. But according to einstein's theory, time flow is different for different observers. The idea that time flow is not the same for all may sound strange because we may not experience this effect in everyday life. This effect is only observed when an object moves with some velocity comparable to the velocity of light. This velocity is termed relativistic velocity.