Girl on a Wagon throws the weghel horratany o\" the back-e, n at \'speed of 100

Question

Girl on a Wagon throws the weghel horratany o" the back-e, n at 'speed of 100 m/s retethetohrer Amumng that the wagon at rest A31.0kg giri stards on a 6.0-kg wagon holding two 12.5-kg wegres. She initially, what is the speed of the girl relative to the ground after she throws both weights at the same time? in m/s) A:4.03OB: 5.36 : 7.13 | D: 9.49 Anewer Tries 0/ Assuming that the wagon was at rest intialy, what is the speed relative to the tin m/s) weights one at a time, each with a speed of 10.0 m/s relative to hersen ground with which the girl wil move after she threws the Submit Anaw Tries 0/

Explanation / Answer

Let her speed is v m/s

conservig momentum

initial momentum=final momentum

25*(10-v)=37*v

we got

v=4.03 m/s

(b)

if one weight is thrown

12.5*(10-v)=(37+12.5)v

we got

v=2.016 m/s

After throwing again,let velocity is v m/s

12.5*(12.016-v)=37v

we got v=3.03 m/s

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