全英文 物理题. During the annual shuffleboard competition.
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全英文 物理题. During the annual shuffleboard competition.
During the annual shuffleboard competition, Renee gives her puck an initial speed of 9.32m/s. Once leaving her stick, the puck slows down at a rate of 4.06m/s/s.
a.Determine the time it takes the puck to slow to a stop.
b.Use your initial speed and the calculated time to determine the average speed and the distance which the puck travels before stopping.
不明白4.06m/s/s 代表什么意思.
不知道怎么已知初速度求平均速度和距离.
谢谢各位. ^^
During the annual shuffleboard competition, Renee gives her puck an initial speed of 9.32m/s. Once leaving her stick, the puck slows down at a rate of 4.06m/s/s.
a.Determine the time it takes the puck to slow to a stop.
b.Use your initial speed and the calculated time to determine the average speed and the distance which the puck travels before stopping.
不明白4.06m/s/s 代表什么意思.
不知道怎么已知初速度求平均速度和距离.
谢谢各位. ^^
4.06m/s/s 指的是加速度a,由于未限制距离,所以可以知道最后末速度为0,根据公式Vt=Vo+at ,可以求出t=9.32/4.06=2.30s.再根据公式Vt2-Vo2=2as ,求出S=(9.32)2/2(4.06)=10.70m.最后V平=s/t=10.70/2.30=4.65m/s.这样就可以了.
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