Question

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A ball of mass 50g moving at a speed of 2.0 m/s strikes a plane surface at an angle of incidence 45° . the ball is reflected by the plane at equal angle of reflection with the same speed . calculate

(a) The mangnitude of the change in momentum of the ball

(b) the change in tha magnitude of the ball .

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Answer 1

velocity =2 M/S
mass =50gm in kg=0.05kg
a) momentum (p)=mass (m)×velocity (s)
p=mv
p=0.05 ×2
p=0.1kgm/s