Questions to be known 1. What is an impulsive force? 2. Define impulse? 3. Give formula for impulse. 4. Derive a relation of kinetic energy Ek in terms of momentum p. 5. How to solve problems involving momentum in two dimensions? 6. What do you mean by elastic and inelastic collision? 7. What do you mean by angular displacement? 8. What is the unit of angular displacement? 9. Define angular velocity w (omega). 10.Give relation between and linear velocity v and angular velocity w(omega). 11.If an object is moving in a circular path at constant speed, does it have acceleration? If yes, explain. 12. What do you mean by centripetal acceleration ac? 13.Give formula for centripetal acceleration ac in terms of linear velocity v as well as angular velocity w (omega). 14.Define centripetal force Fc. 15.Give formula for Fc in terms of linear velocity v as well as angular velocity w (omega)