Question

two spherical bodies of mass 20g and 24 g are moving with velocities 7m/s and 5m/same direction after colliding with each other,they stick together and move with same velocity calculate the common velocity with which they move​

Answer 1

Answer:

Mass of first body is m

1

=0.1 kg and its velocity before collision u

1

=1 m/s

Mass of second body is m

2

=0.4 kg and its velocity before collision u

2

=−0.1 m/s (moving in opposite direction)

Let the velocity of combined mass just after collision be V.

Using conservation of linear momentum :

m

1

u

1

+m

2

u

2

=(m

1

+m

2

)V

∴ (0.1)(1)+(0.4)(−0.1)=(0.1+0.4)V

⟹ V=0.12 m/s

Time t=10 s

Distance covered S=Vt=0.12×10=1.2 m