train is travelling at a speed of 15m/s and slows down uniformly to 5m/s whileA train is travelling at a speed of 15m/s and slows down uniformly to 5m/s while travelling a distance of 50m.(1)Find its acceleration in this time .(2) It travel before co
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train is travelling at a speed of 15m/s and slows down uniformly to 5m/s whileA train is travelling at a speed of 15m/s and slows down uniformly to 5m/s while travelling a distance of 50m.(1)Find its acceleration in this time .(2) It travel before co
train is travelling at a speed of 15m/s and slows down uniformly to 5m/s while
A train is travelling at a speed of 15m/s and slows down uniformly to 5m/s while travelling a distance of 50m.
(1)Find its acceleration in this time .
(2) It travel before coming to rest assuming the same acceleration is________
可以只给这道题的翻译.
train is travelling at a speed of 15m/s and slows down uniformly to 5m/s whileA train is travelling at a speed of 15m/s and slows down uniformly to 5m/s while travelling a distance of 50m.(1)Find its acceleration in this time .(2) It travel before co
一列火车以 15m/s 的速度行驶,以一定的加速度运动50m,速度变为5m/s
(1)求出此时加速度
(2)如果以此加速度继续运动,______能停下来
利用公式 末速度的平方-初速度的平方=2as ∴a=(5^2-15^2)÷(2x50)=-2m/s^2
t=(vt-vo)/a=(0-5)/(-2)=2.5s
第二问不太确定.
一列火车以15m / s的速度做匀减速运动,当经过的距离为50m时,火车速度为5m/s
1.求这时火车加速度
2.不会啊,求大神
第2题,v=u+at
V=0,u=15,a=-2
t=(7.5)^1/2
对于第二问我的看法是:当它的恒定加速度为多少时,火车刚好停下。此时,已知条件中有用的为初始速度15m/s 行驶距离为50m 求其在行驶50m停下所需的加速度 ,为2.25m/s^2