At the instant t = 0, a force F = k t ( k is a constant) acts on a small body of mass m resting on a smooth horizontal surface. The time, when the body leaves the surface is

Question

At the instant t = 0, a force F = k t ( k is a constant) acts on a small body of mass m resting on a smooth horizontal surface. The time, when the body leaves the surface is, m g k sin ⁡ α, k sin α m g, m g sin ⁡ α k, m g k sin ⁡ α

MARKS App · Accepted Answer

N + F sin ⁡ α = m g The body leaves the surface when the normal reaction on it becomes zero. N = 0 ⇒ k t sin ⁡ α = m g t = m g k sin ⁡ α

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