the monkey moving with respett o rucC-6. A boy of mass 60 kg is standi

1.	the monkey moving with respett o rucC-6. A boy of mass 60 kg is standing over a platform of mass 40 kg placed over a smooth horizontal surfaceHe throws a stone of mass 1 kg with velocity v = 10 m/s at an angle of 45° with respect to the groundFind the displacement of the platform (with boy) on the horizontal surface when the stone lands on theground. (g 10 m/s2)
Answer» total mass of body and plateform = 100kg conservation of momentum in horizontal direction 100V + 110cos45 =0 V=-1/10√2 m/sec negative sign indicates in the reverse direction. time of filght = 210 sin 45 /10 = √2 so in this time plateform will move = Vt =1/10√2 √2 = .1 m answer

the monkey moving with respett o rucC-6. A boy of mass 60 kg is standing over a platform of mass 40 kg placed over a smooth horizontal surfaceHe throws a stone of mass 1 kg with velocity v = 10 m/s at an angle of 45° with respect to the groundFind the displacement of the platform (with boy) on the horizontal surface when the stone lands on theground. (g 10 m/s2)

Answer»

total mass of body and plateform = 100kg

conservation of momentum in horizontal direction 100V + 1*10cos45 =0

V=-1/10√2 m/sec

negative sign indicates in the reverse direction.

time of filght = 2*10 sin 45 /10

= √2

so in this time plateform will move = V*t

=1/10√2 *√2

= .1 m answer