Question

find the change in momentum of ball mass 100g with the speed of 30ms/1 is brought to rest by a player in​

Answer 1

Answer:

mass of the ball (m) =100g or 0.1kg

initial velocity (u) =30 m/s

time (t) = 0.03sec.

final velocity (v) = 0

Initial momentum = mu

= 0.1kg*30m/s

= 3.0 kgm/s

Final momentum = mv (which is equal to 0, since v is zero)

Change in momentum = mv-mu

= 0 - 3.0 = -3.0 kgm/s

Average force = Change in momentum / time

= -3.0 kgms-1 /0.03s

= -100 kgm/s2

= -100 N

Answer 2

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I guess the question is the rate of change in momentum

Mass= 0.1 kg

Initial Momentum= m*speed (u)=0.1*30= 3

Final Momentum= m* rest (v)= 0.1*0 = 0

Change in Momentum= Final-Intial = 0-3 = -3

Rate of change in momentum= (change in momentum)÷time taken 

                                               = (-3)÷0.03

                                               = -100