Question

a boy of mass 40 kg running with speed 6m/s jumps on to a 10 kg trolley travelling in the same direction at 2m/s find the common velocity​

Answer 1

Answer:

In cell biology, the cytoplasm is all of the material within a eukaryotic cell, enclosed by the cell membrane, except for the cell nucleus. The material inside the nucleus and contained within the nuclear membrane is termed the nucleoplasm. The main components of the cytoplasm are cytosol (a gel-like substance), the organelles (the cell's internal sub-structures), and various cytoplasmic inclusions. The cytoplasm is about 80% water and is usually colorless.[1]

Answer 2

Answer:

Mass of the boy , m1=50kg

Speed of boy,u1=5m/s

Mass of trolley m2=20kg

Speed of trolley u2=1.5m/s

Combined mass of boy and trolley, m=20+50=70kg

Combined velocity v

Acc.to the low of conservation of momentum

m1u1+m2u2=mv

50×5+20×1.5=70×v

v=70250+30=4m/s