Question 20 (1 point) A 2100 kg truck is travelling at 31 m/s [E] and collides with a 1500 kg car travelling 24 m/s [E]. The two vehicles lock bumpers and continue on as one object. The decrease in kinetic energy during the inelastic collision is_ Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer Question 21 (2 points) A 3500 kg vehicle travelling at 25.0 m/s [N] collides with a 2000 kg vehicle travelling at 20.0 m/s [450 S of W]. The vehicles become tangled together. If we assume the conditions were poor and that friction was not a factor, the distance the vehicles traveled 4.9 seconds after the collision was __ _m. A/ Enter your two-digit numerical value. Question 22 (1 point) A clerk working at a local food store is asked to retrieve the empty shopping carts left outside by shoppers. Each cart has a mass of 34 kg. The clerk places 4 carts, which are locked together, close to the entrance on a slight incline. The clerk gathers another 12 carts and pushes them toward the store entrance. Meanwhile, the first 4 carts roll toward the 12 carts with a speed of 2.29 m/s. When the carts collide, they all come to a complete stop. The speed at which the 12 carts were moving just before impact is m/s. Enter your three-digit numerical value. Question 23 (1 point) During the playoff season, hockey fans will sometimes throw an octopus onto the ice to celebrate their team's victory. The largest octopus ever thrown onto an ice rink had a mass of 22.7 kg. A hockey puck with a mass of 150 g and a speed of 50.0 m/s collides with and embeds itself into a 22.7 kg octopus lying at rest on the ice surface. The speed of the octopus-puck system after collision is m/s. Enter your four-digit numerical value. Question 24 (1 point) Jim (71.9 kg) and Pam (43.2 kg) both wearing skates face each other at rest on a skating rink. Jim pushes Pam, sending her eastward with a velocity of +4.64 m/s. Neglecting friction, the subsequent velocity of Jim is - m/s. Enter your three-digit numerical value