Question

A ball of mass 5kg strikes against a wall at an angle of 45degree and is reflected at the same angle.find the change in momentum

Answer 1

Answer

change in momentum = 10ucos45

Step by step explanation

Given in the question,

mass of ball = 5kg

angle at which it deflected back = 45°

Formula to use

change of mometum = mΔucosФ

where m = mass

            u = velocity

           Ф = angle

           Δ = change

The change in momentum equals the mass times the change in velocity.

change in momentum = impulse

                                    = 5ucos45 - (- 5ucos45)

                                     = 2 (5ucos45)

                                     = 10ucos45