During a football game, a receiver has just caught a pass and is standing still. before he can move, a tackler, running at a velocity of +4.2 m/s, grabs and holds onto him so that they move off together with a velocity of +2.3 m/s. if the mass of the tackler is 125 kg, determine the mass of the receiver in kilograms. assume momentum is conserved.

Abeverage can is made of 3004-h19 aluminum alloy (elastic modulus 69 gpa, tensile yield strength 285 mpa, density 2.72 g/cm^3). the dimensions on the can are approximated as a thin-walled cylinder with a height of 4.83 inches, diameter of 2.60 inches. empty the can has a mass of 14.2 g. determine: a. the wall thickness of the cylinder b. assuming a pinned-pinned condition what is the critical load? c. assuming a fixed-fixed condition what is the critical load?