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.
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