CBSE Class 9 Answered

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.