Ametal sphere with a mass of 80.0g rolls along frictionless surface at 20.0m/s and strikes a stationary sphere having a mass of 200.0g. the first sphere stops completely. at what speed does the second sphere move away from the point of impact

8.0 m/s

Explanation:

By the law of conservation of momentum, the total momentum before the collision must be equal to the total momentum after the collision:

The total momentum before the collision is given only by the momentum of the first sphere, since the second sphere is stationary (so its speed is zero and its momentum is zero as well):

The total momentum after the collision is given only by the momentum of the second sphere, since the first sphere completely stops, so:

Using conservation of momentum, we find

it takes about 30 days for it to break down

it breaks and dirupture other materials and other sencews from the bottom