Question

longest word without a vowel

Answer 1

Given :-

A ball of mass 100 g strikes a wall normally with a speed of 10 m/s and rebounds with the same speed but in opposite direction

To Find :-

Magnitude = ?

Solution :-

We know that

1 kg = 1000 g

100 g = 100/1000 = 0.1 kg

Now

Initial momentum = Mass × Initial velocity

p₁ = m × u

p₁ = 0.1 × 10

p₁ = 1 kg m/s

Final momentum = Mass × Final velocity

Since, It move in opposite direction.

So v = -10 m/s

p₂ = m × v

p₂ = 0.1 × (-10)

p₂ = -1 kg m/s

Now

Δp = p₂ - p₁

Δp = -1 - 1

Δp = -2 kg/ms

Remarks :-

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