Whats the difference between momentum and impulse?

If the speed of a particle triples ,by what factor does its kinetic energy increase?

The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.

According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?