A car of mass 1500 kg travelling at 25 m/s collides with another car B of mass 1000 kg travelling at 15 m/s in the same direction after the collision, the velocity of car B will be

Q. Ball

A

of mass

5.0 k i l o g r a m s

moving at

20 m / s

collides with ball

B

of unknown mass moving at

10 m / s

in the same direction, After the collision, ball

A

moves at

10 m / s

and ball

B

15 m / s

in the same direction. What is the mass of ball

B

Q. A body of mass 2 kg , initially moving with a velocity of 10 m/s collides with another body of mass 5 kg at rest. After collision velocity of first body becomes 1 m/s . Find the velocity of the second body.

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A body A of mass 150 kg, travelling at 20 m/s collides with a body B of mass 100 kg travelling at 10 m/s in the same direction. After collision the velocity of A becomes 15 m/s. What is the magnitude of velocity of B after the collision?

The correct option is C 17.5 m/sGiven : mA=150 kg uA=20 m/s mB=100 kg uB=10 m/s vA=15 m/sLet the speed of B after the collision be vB.Using conservation of linear momentum before and after the collision : Pi=Pf∴ mAuA+mBuB=mAvA+mBvAOR 150×20+100×10=150×15+100vB ⟹vB=17.5 m/s

A body $A$ of mass $150 k g$ , travelling at $20 m / s$ collides with a body $B$ of mass $100 k g$ travelling at $10 m / s$ in the same direction. After collision the velocity of $A$ becomes $15 m / s$ . What is the magnitude of velocity of $B$ after the collision?