6.On what factor should the coefficient of restitution depend when two bodies having masses m and M (m < M) collide with each other?

7.A wire suspended vertically from one of its ends is stretched by attaching a weight of 200 N to the lower end. The weight stretches the wire by 1 mm. Then, the elastic energy stored in the wire is:

8.Youngs modulus is defined for:

9.The longitudinal extension of any elastic material is very small. In order to have an appreciable change, the material must be in the form of:

10.Youngs modulus for perfectly inelastic body is: