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Physics Momentum Question!!? please? |
the longest bicycle in the world was built in new zealand in1988. it is more than 20m in length. has a mass of 340 kg and can be ridden by 4 people at a time. suppose four people are riding the bike at a velocity of 12 km/h southeast when they realize that the street turns and that the bike wont make it around the corner. all four riders jump off the bike at the same time and with the same veloctiy (9.0 km/h northwest as measured relative to earth. if the combined mass ofthe riders is 260 kg, what is the ike's new velocity immediatly after the riders jump off? Using conservation of momentum, and SE as positive. Note that NW is negative (340+260)*12= 260*(-9)+340*v 9540/340=v v=28m/s SE j 6 km/h northwest (340+260)*12=260*(-9)+340*(x) x=(7200+2340)/340=28.058km/h southeast. |
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