The magnitude of the change in momentum of the ball while it is in contact with the ball is 3.4 kgm/s.
The change in the momentum of the soft ball is calculated by applying the principle of conservation of linear momentum as shown below.
Mathematically, change in momentum is given as;
ΔP = Pf - Pi
where;
ΔP = m(Vf - Vi)
where;
ΔP = -mVi
ΔP =-mViₓ
The initial horizontal velocity (Viₓ) of the ball is calculated as;
Viₓ = Vi cosθ
ΔP = -mVi cosθ
ΔP = - (0.35)(11) cos(28)
ΔP = -3.4 kgm/s
magnitude = 3.4 kgm/s
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