Question

A boy of mass 50 kg running at 5 metre per second jumps on a 20 kg trolley travelling in the same direction at 1.5 m per second. what is there common velocity?? please answer me fast.....

Answer 1

m1u1+m2u2v=(m1+m2)v=m1u1+m2u2m1+m2=50⋅5+20⋅1.550+20=4 m/sm1u1+m2u2=(m1+m2)vv=m1u1+m2u2m1+m2=50⋅5+20⋅1.550+20=4 m/s





THANK YOU

Answer 2

Mass of boy = m1 = 50 kg

Mass of trolley = m2 = 20 kg

Initial velocity of boy = u1 = 5 ms-1

Initial velocity of trolley = u2 = 1.5 ms-1

Final velocity =

v = m1u1 + m2u2 \ m1 + m2

50 × 5 + 20 × 1.5 ÷ 50 + 20

= 4ms-1

HOPE IT HELPS YOU!!!