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27 Nov 2019
Two balls of mass 0.5 kg and 0.8 kg are connected by a low-massspring. This device is thrown through the air with low speed, soair resistance is negligible. The motion is complicated: the ballswhirl around each other, and at the same time the system vibrates,with continually changing stretch of the spring. At a particularinstant, the 0.5 kg ball has a velocity ⹠6, -5, 3 ⺠m/s and the0.8 kg ball has a velocity ⹠4, 3, 7 ⺠m/s.
(a) At this instant, what is the total momentum of thedevice?
total = kg · m/s
(b) What is the net gravitational (vector) force exerted by theEarth on the device?
grav = N
(c) At a time 0.09 seconds later, what is the total momentum of thedevice?
total = kg · m/s
Two balls of mass 0.5 kg and 0.8 kg are connected by a low-massspring. This device is thrown through the air with low speed, soair resistance is negligible. The motion is complicated: the ballswhirl around each other, and at the same time the system vibrates,with continually changing stretch of the spring. At a particularinstant, the 0.5 kg ball has a velocity ⹠6, -5, 3 ⺠m/s and the0.8 kg ball has a velocity ⹠4, 3, 7 ⺠m/s.
(a) At this instant, what is the total momentum of thedevice?
total = kg · m/s
(b) What is the net gravitational (vector) force exerted by theEarth on the device?
grav = N
(c) At a time 0.09 seconds later, what is the total momentum of thedevice?
total = kg · m/s