30 points and explain how to find the kinetic and potential energy a 2-kg ball rolls at 2 m/s along a table that is 1 meter off the ground. how much mechanical energy does the ball have?

19.6 j

4 j

15.6 j

23.6 j

⭐Hey User

⭐Since here the Energy can be calculated as ..

↪KINETIC ENERGY = 1/2 *M * V^2

↪here M = mass of the body and V = its velocity..

↪thus K.E. = 1/2 *(2)*(2)^2 = (4) = 4 joules

↪POTENTIAL ENERGY = Mgh

↪here M = mass of the body , g = Accelation due to the gravity and h = height from the ground ..

↪thus P.E. = (2) * (9.8)*(1)= 19.6

↪P.E. = 19.6 joules ..

↪thus we know that MECHANICAL ENERGY = POTENTIAL ENERGY + KINETIC ENERGY

↪THUS MECHANICAL ENERGY = 19.6 + 4 = 23.6 J

〽⭐therfore the M.E possed = 23.6 J

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.