A ball of mass m = 100 gm is connected to a spring of constant 1000 N/m and kept on a smooth level ground. An electric field E = 100 N/C exists towards the right. The ball is given a charge of 100 µC. What is the maximum speed of the ball in subsequent motion ? (in mm/sec).

Engineering

Physics

Charge and Coulombs Law

Question

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$A = \frac{QE}{k} = \frac{10^{4} \times 100}{10^{3}} = 10^{- 5} m$

$V_{\max} = Aω = \sqrt{\frac{k}{m}} \times A = \sqrt{\frac{1000}{0 .1}} \times 10^{- 6} m / s = 10^{- 3} m / s = 1 mm / s$