Two particles of masses m and 3m are moving toward each other along the x-axis with the same speed v. they undergo a head- on elastic collision and rebound along the x- axis. determine the final speed of the heavier object.

0

Explanation:

Given

two particles of mass m and 3m

They  move towards each other with velocity v

As the collision is Elastic therefore value of coefficient of restitution is 1

if and are velocity of approach of m and 3 m

and and are velocity after collision respectively

therefore

conserving momentum

Therefore velocity of heavier mass is zero

0.19 m/s and 0.45 m/s

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.