请问一道物理题(语言为英语)(11 points possible)An object is moving along a straight line parallel to the x-axis.Its position as a function of time is given by:x(t)=20 m−14 (m/s) t+2 (m/s2) t2where the position x is in (m) and the tim
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![请问一道物理题(语言为英语)(11 points possible)An object is moving along a straight line parallel to the x-axis.Its position as a function of time is given by:x(t)=20 m−14 (m/s) t+2 (m/s2) t2where the position x is in (m) and the tim](/uploads/image/z/7165483-43-3.jpg?t=%E8%AF%B7%E9%97%AE%E4%B8%80%E9%81%93%E7%89%A9%E7%90%86%E9%A2%98%28%E8%AF%AD%E8%A8%80%E4%B8%BA%E8%8B%B1%E8%AF%AD%29%2811+points+possible%29An+object+is+moving+along+a+straight+line+parallel+to+the+x-axis.Its+position+as+a+function+of+time+is+given+by%3Ax%28t%29%3D20+m%26%238722%3B14+%28m%2Fs%29+t%2B2+%28m%2Fs2%29+t2where+the+position+x+is+in+%28m%29+and+the+tim)
请问一道物理题(语言为英语)(11 points possible)An object is moving along a straight line parallel to the x-axis.Its position as a function of time is given by:x(t)=20 m−14 (m/s) t+2 (m/s2) t2where the position x is in (m) and the tim
请问一道物理题(语言为英语)
(11 points possible)
An object is moving along a straight line parallel to the x-axis.Its position as a function of time is given by:
x(t)=20 m−14 (m/s) t+2 (m/s2) t2
where the position x is in (m) and the time t is in (s).
(a) What is the object's velocity at t=0 s,2 s,and 5 (enter the x-component of the velocity in m/s.Do not enter the units in the box.)
有七小题,但是第一题我就无法理解到底是要怎样
个人理解是一个物体沿X轴直线运动.x(t)=20 m−14 (ms) t+2 (ms2) t2是x位置的方程式.x的单位是米,t的单位是秒.
题a)是求物体在0秒,2秒,5秒时的速度
可是这要怎麼求,如果0秒是初速度的话那不就是原题的14吗,但是显示错误.
请问一道物理题(语言为英语)(11 points possible)An object is moving along a straight line parallel to the x-axis.Its position as a function of time is given by:x(t)=20 m−14 (m/s) t+2 (m/s2) t2where the position x is in (m) and the tim
对X求导,x'=-14+4t,0s,v=x'=-14;;;;;;;;;;2s,v=x'=-6;;;;;;;;;;;5s,v=x'=6.注意正负.