Question

a ball is thrown up by a person . explain how the kinetic energy and potential energy of the ball change​

Answer 1

Answer:

Kinetic Energy = Energy Associated with Motion

1/2 mass * Velocity * Velocity = 1/2mv2

Momentum is Mass * Velocity = mv

Conservation of Momentum is a rule of mechanics. your intution has already told you about it.

Consider hitting a baseball. The bat, with some mv, makes impulsive contact with a ball - mbat is greater than mball and since:

(mv)bat = (mv)ball

then vball is greater than vbat (provided that you hit the ball and not just air).

Same principle holds in the situation of cannon recoil:

Potential Energy --> object has a position in a force field

Potential Energy = mass * grav. acceleration * height

PE = mgh

g = gravitational acceleration of the earth

since F = ma and since the earth exerts a continuous gravitational force on all objects of mass, m, then the manifest force is

F = mg --> this is what weight is !

Now look what Newton says we can now do

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