Question

a ball of mass 5kg strikes against a wall at an angle 45 degree and us reflected back at the same angke and speed. find the change in momentum

Answer 1

here final momentum-initial momentum=2mvcos45=10v/1.4

Answer 2

m = 5kg , θ = 45°

Change in momentum = Δp

Δp = 2mvcosθ

= 2 × 5 × cos45° × v

= 10v/√2

= 5v√2