Questions
A dish of mass 10 g is kept floating horizontally in the air by firing bullets each of mass 5 g with the same velocity. If 10 bullets are fired per second and the bullets rebound with the same velocity, then the velocity of each bullet is
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Correct option is B
n×mu−n×(−mu)=Mg⇒u=Mg2nm=10×9802×10×5cm/s⇒u=98cm/sSimilar Questions
Statement I : The familiar equation mg = R for a body on a table is true only if the body is in equilibrium.
Statement II : The equality of mg and R has no connection with the third law.
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