assume that g=10m/s2 and that there is no air resistance.Complete the velocity-time diagram and calculate the distance traveled using the area method.a) 5s after a stone is dropped from rest.b) 5s after a stone is thrown downwards at a velocity of 20
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assume that g=10m/s2 and that there is no air resistance.Complete the velocity-time diagram and calculate the distance traveled using the area method.a) 5s after a stone is dropped from rest.b) 5s after a stone is thrown downwards at a velocity of 20
assume that g=10m/s2 and that there is no air resistance.Complete the velocity-time diagram and calculate the distance traveled using the area method.
a) 5s after a stone is dropped from rest.
b) 5s after a stone is thrown downwards at a velocity of 20m/s.
c)a car accelerates from rest to 20m/s in 10s,travels in constant velocity for 5s then finally decelerates at a rate of 5m/s until it comes to a halt.
每一个问题都有一个图。
坐标图。y轴是velocity。x轴是time
assume that g=10m/s2 and that there is no air resistance.Complete the velocity-time diagram and calculate the distance traveled using the area method.a) 5s after a stone is dropped from rest.b) 5s after a stone is thrown downwards at a velocity of 20
V-T就不画了
1 s=0.5gt^2=125m
2 s=vt+0.5gt^2=225m
3 s=0.5×(5+10+5+4)×20=240m
叫你把图画上去。。。。。。。。。
我还没学过加速度,给你翻译一下吧。
假设g=10m/s2 ,没有空气阻力。
请完成v-t图,并且计算出距离。
a)5秒后,一个石头开始从静止下落。
b)5秒后,一个石头以20m/s的速度被向下扔出。
c)一辆车从静止到以20m/s的速度开启,用了5秒,然后以5m/s的减速度(不知道是不是这么说啊,减速度~)开,直到停下来。...
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我还没学过加速度,给你翻译一下吧。
假设g=10m/s2 ,没有空气阻力。
请完成v-t图,并且计算出距离。
a)5秒后,一个石头开始从静止下落。
b)5秒后,一个石头以20m/s的速度被向下扔出。
c)一辆车从静止到以20m/s的速度开启,用了5秒,然后以5m/s的减速度(不知道是不是这么说啊,减速度~)开,直到停下来。
收起
把三个图合到一个里面了 比列也不准确 题目要你计算 a b c 与坐标轴所围成的面积
C的大意:
一辆汽车10秒内从静止加速到20m/s,之后匀速行驶了5秒钟,再以-5m/s的加速度减速直到停下来