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A 5kg mass moving with a velocity of 2m/s collides with a 2kg mass moving at 7m/s along the same line. If the two masses...

A 5kg mass moving with a velocity of 2m/s collides with a 2kg mass moving at 7m/s along the same line.
If the two masses join together on impact, find their common velocity if they were moving:
a) In opposite directions.
b) In the same direction.

Answers

Moraa
a) In opposite directions.
Total linear momentum before collision=total linear momentum after collision
(5*2) + (2*-7)=(5+2)v
15v=-20
v=-20/15 =-1.33m/s
the bodies move in the initial direction of the 2kg mass
b) In the same direction.
Total linear momentum before collision=total linear momentum after collision
(5*2)+(2*7)=(5+2)v
15v=120
v=120/15 =8m/s
Moraa orina answered the question on April 9, 2018 at 06:36

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