further mechanics

Question 1

impulse

Answer 1

F∆t=∆p,
change in momentum

Question 2

conservation of linear momentum in two dimensions

Answer 2

resolve the motion into components along a perpendicular axes. treat y and x separately, so the momentum in the y before= momentum in the y after

Question 3

elastic and inelastic collisions

Answer 3

elastic-where energy and momentum are both conserved
inelastic-where only momentum is conserved

kinetic energy is converted into other forms, if the two objects such together then the collision is inelastic.
explosion is also inelastic

Question 4

angular velocity

Answer 4

angle an object moves through per unit time found by dividing the linear velocity by the radius it is travelling through.