22.

A two-stage rocket moves in space at a constant velocity of +4570 m/s. The two stages are then separated by a small explosive charge placed between them. Immediately after the explosion the velocity of the 1450-kg upper stage is +5990 m/s. What is the velocity (magnitude and direction) of the 2430-kg lower stage immediately after the explosion? Number UnitsBy accident, a large plate is dropped and breaks into three pieces. The pieces fly apart parallel to the floor. As the plate falls, its momentum has only a vertical component, and no component parallel to the floor. After the collision, the component of the total momentum parallel to the floor must remain zero, since the net external force acting on the plate has no component parallel to the floor. Using the data shown in the drawing find (a) the mass of piece 1 and (b) the mass of piece 2. 3.00 m/s 25.0 1.79 m/s 45.0 INa = 1.30 ke 3.07 m/'s (a) Number Units (b) Number UnitsAfter skiding down a snow-covered hill on an inner tube, Ashley is coasting across a level snowfield at a constant velocity of +2.9 m/s. Miranda runs after her at a velocity of +4.8 m/s and hops on the inner tube. How fast do the two of them slide across the snow together on the inner tube? Ashley's mass is 68 kg, and Miranda's is 47 kg. Ignore the mass of the inner tube and any friction between the inner tube and the snow. VO2 Vol Number UnitsA car (mass = 1100 kg) is traveling at 30.0 m/s when it collides head-on with a sport utility vehicle (mass = 2090 kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. At what speed was the sport utility vehicle traveling? Vo. SUV Vo, car Before collision After collision Number i Units