A spring of spring constant `5xx10^3 N//m` is stretched initially by 5cm from the unstretched position. Calculate the work required to stretch it further by another 5cm.

An elastic spring of spring constant k is stretched by an amount x from natural length position. Show that its potential energy is 1/2 kx^2

When a 4kg mass is hung vertically on a light spring that obeys Hooke's law, the spring stretched by 2cm. Calculate the work required to be done by an external agent in stretching this spring by 5cm.

An elastic spring of length L and of force constant k is stretched to increase its length by an amount x. The spring is further stretched to elongate it by y. The amount of work done in stretching the spring in the second case ( x and y are very small) is

A long spring is stretched by 2 cm. its potential energy is U . If the spring is stretched by 10 cm , its potential energy would be

The rate constant for an isomerisation reaction A rarr B is 4.5xx10^-3 (min)^-1 . If the initial concentration of A is 1 M. Calculate the rate of reaction after 1 hr.