A molecule of mass m moving at a velocity v elastically impinges on the wall at an angle α with the wall. Then

Question

A molecule of mass m moving at a velocity v elastically impinges on the wall at an angle α with the wall. Then, the impulsive reaction of the wall is 2 m v cos ⁡ α, the impulsive reaction of the wall is 2 m v sin ⁡ α, the impulsive reaction of the wall is nonzero, given data is insufficient to calculate impulsive reaction of the wall

MARKS App · Accepted Answer

Impulse, Δ p → = p f → - p i → Δ p → = m v - sin ⁡ α i ^ + cos ⁡ α j ^ - m v sin ⁡ α i ^ + cos ⁡ α j ^ Δ p → = - 2 m v sin ⁡ α i ^

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