Question
Define power and explain the following points (a) Instantaneous power (b) average power (c) power factor
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Two blocks A and B, each of mass m, are placed on the two sides of the stand. At t = 0, the separation between A and the mirrors is 2 R and also the separation between B and the mirrors is 2 R. The block B moves towards the mirror at a speed v. All collisions which take place are elastic. Taking the original position of the mirrors-stand system to be x = 0 and X-axis along AB, find the position of the images of A and B at t = $\frac{\text{R}}{\text{v}}$
$\frac{3\text{R}}{\text{v}}$
$\frac{5\text{R}}{\text{v}}$
