Question

15. Two automobiles traveling at right angles to each other collide and stick together. Car A has a mass of 1000 kg and had a speed of 25 m/s before the collision. Car B has a mass of 1500 kg. The skid marks show that, immediately after the collision, the wreckage was moving in a direction making an angle of 40° with the original direction of car A. What was the speed of car B before the collision, assuming that any other unbalanced forces are negligible? 16. A pulley is rotating at initial angular speed of 15.4 rad/s with a constant angular acceleration of 2.42 rad/s?. In 5.0 sit has turned through what angle.

Answer 1

Ans. (16) Wo: 15.4 radlsec as 2.42 rad/s2 ,tas sec. + ودیا دنیا w2= wo²+gro 27.5) (154) + 2(2.42) 15.4 +(2.42)(5) 27.5 rad/sc.. 10= 107.25 rad Ang. ** Amis 4 Ас- 25 ml Gacool Conservation of momentum min, to evimit me 160840 -> aloryx-axis. m₂ 4₂ to = v(mitm) sinto => alonyy-axis 42 B Gassto pom 1st eq- mui VE put in and equation m₂ U₂ = (mitm)(ese iniu |+ m₂) singo 968) Eutica) 1000 tanto = ofuby & sex 4 = mi m₂ cofurt'n'm m₂ 4₂ 1500 . U₂ = 13. 985 misu. ~ 13-98 mis