A weight raised a certain height gains 19.6 J of potential energy. A second block with three times the mass is raised through the same height. What is the potential energy gained? a. 6.53 J b. 58.8 J c. 9.8 J d. 19.6 J

58.8J

Explanation:

Given parameters:

Potential energy gained = 19.6J

  Let the mass of the first one = m

         Mass of the second one = 3m  

Unknown:

New potential energy = ?

Solution:

Potential energy is the energy due to the position of a body;

        P.E  = mgh

  The body were raised through the same height

   let the height = h

First potential energy;

        P.E  = 19.6 = m x g x h

Second potential energy;

       P.E  = 3m x g  h

From the first body;

       mgh = 19.6

Second body;

      P.E  = 3(mgh) = 3(19.6) = 58.8J

the area between the graph and the t axis

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force