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# 1 write an expression for gravitational potential energy of an object with mass x placed at height y.2 how would the potential energy change if the mass of the object is doubled.3 how would the potential energy change if the object now is placed at double its original height.4 name 2 forms of energy involved while a pendulum oscillates.explain.5 show with the help of a diagram that when does each type of energy attains its maximum value.6 how do these energies vary while the pendulum oscillates.7 name the law involved.

Asked by Navpankaj Jain 19th March 2014, 4:02 PM
Gravitational potentail enegy V = mgh

Here, mass m = x
height = y

Therefore, V = gxy

2. Potential energy is directly proportional to the mass of the object.
Hence, potential energy also becomes double if mass of the object is doubled.

3. Potential energy is directly proportional to the height of the object.
Hence, potential energy also becomes double if height of the object is doubled.

Kindly ask seperate questions as seperate query.
Answered by Expert 19th March 2014, 6:06 PM
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