Show that the work done by a varible force is equal to the change in kinetic energy of an object.

Show that the work done by an external constant force on a body is equal to the change in kinetic energy of the body.

(i) Show that heat of reaction at constant volume is equal to the change in internal energy of the system. (ii) Show that heat of reaction at constant pressure is equal to the change in enthalpy of the system.

Applying a force of F =196 N upwards, a body of mass 10 kg is raised up to a height of 10 m. Find the work done by the force F and the work done against gravity. Note that the work done by the force F is more than the gravitational potential energy . Show how the law of conservation of energy is still obeyed.

Show that impulse of a force is equal to change in linear mometum produced by the force.

Work done by magnetic force is zero. Explain.

Statement I: if work done by conservative force is negative then potential energy associated with that force should increase. Statement II: This is from the reaction Delta u =- W. Here Delta u is change in potential energy and W is work done by conservative force.

Show that the external work done by a gas in an isothermal expansion is equal to the heat supplied to the gas.

Draw the graph representing linear momentum and change in kinetic energy.