1.

B) Two objects of masses 50g and 100g are moving along the same line and direction withvelocities of 5m/s and 10 m/s respectively. They collide and after the collision, the secondobject moves at a velocity of 8 m/s. Determine the velocity of the first object?​

Answer»

Answer:

velocity of first OBJECT is 9m/s.

Explanation:

mass 1= 50g

mass 2=100g

INITIAL velocity 1=5m/s

Initial velocity 2=10m/s

Final velocity 1=?

Final velocity 2=8m/s

now TAKE momentum of the objects

p=mv (initial momentum)

50*5+100*10=1250gm/s-------------1

p=mv (final momentum)

50*v+

100*8=(50v+800)m/s------------2

Now combine 1 and 2-----

1250gm/s=50v+800m/s

1250-800=50v

450=50v

50v=450

v=450/50

v=9m/s.

Therefore velocity of the first object is 9m/s.



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