Question

匀加速行驶的汽车,从静止加速到v,再从v加速到2v,牵引力分别做功w1,w2...

Answer 1

w1=f*s1

w2=f*s2

w1:w2=s1:s2

s1=[(0+v)/2]*t1=(v/2)*(v/a)=1/(2a)

s2=[(v+2v)/2]*t2=(3v/2)*(v/a)=3/(2a)

所以w1:w2=1:3