Someone. problem:

starting with an initial speed of 5.00 m/s at a height of h = 0.260 m, the m1 = 1.55 kg ball swings downward and strikes the m2 = 4.50 kg ball that is at rest, as the drawing shows.

(a) using the principle of conservation of mechanical energy, find the speed of the 1.55-kg ball just before impact.
(b) assuming that the collision is elastic, find the velocities (magnitude and direction) of both balls just after the collision.
(c) how high does each ball swing after the collision, ignoring air resistance?

Part a)

Part b)

Part c)

Explanation:

Part a)

As we know by energy conservation law

initial kinetic energy + initial potential energy = final kinetic energy + final potential energy

So here we know that

now we have

Part b)

As we know that collision is perfectly elastic collision

so we will have

also we know for elastic collision

Part c)

Now the height of each ball is given by

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.