(a) What is the momentum in kg . m/s of a garbage truck that is 1.20 x 10# kg and is moving at 30.0 m/s? (Enter a number.) kg . m/s (b) At what speed in m/s would an 8.00 kg trash can have the same momentum as the truck? (Enter a number.) m/s +A 0.450 kg hammer is moving horizontally at 8.50 rule when it strikes a nail and comes to rest after driving it 1.00 cm into a board. (6:) Calculate the duration of the impact in seconds. [Enter a number.) :|5 (b) What was the average force in newton; exerted downward on the nail? (Enter a number.) :IN Train cars are coupled together by being bumped into one another. Suppose two loaded train cars are moving toward one another, the first having a mass ot140,000 kg and a velocity of 0.300 m/sj and the second having a mass of 105,000 kg and a velocity of 70.120 m/s. (The minus indicates direction of motion.) What is their final velocity (in m/s)? [Enter a number.) E m t During an ice show a 75.0 kg skater leaps into the air and is caught by an initially stationary 85.0 kg skater. (a) What is their final velocity in meters per second assuming negligible friction and that the 75.0 kg skater's original horizontal veIOClty was 4.00 rnls? (Enter a number.) E m (b) How much Kinetic energy is lost in joules? (Enter a number.) :1 Two carts mounted on an air track are moving toward one another Cart 1 has a speed of1.1 m/s and a mass 0H154 kg. Cart 2 has a mass of 0.69 kg. (a) It the total momentum of the system is to be zeroj what is the initial speed (in m/s) of Cart 2? (Enter a number.) S m (b) Does it follow that the kinetic energy of the system is also zero since the momentum of the system is zero? 0 Yes ONO (c) Determine the system's kinetic energy (in J) in order to substantiate your answer to part (b). (Enter a number.) :1