因为是光滑水平面.
唯一的阻力f=mgu=0.5*10*0.2=1N (对于小滑块是动力)
a1=f/m=1/0.5=2m/(s*s)
a2=(F-f)/M=3.5/1=3.5m/(s*s)
s(M)-s(m)=0.5*a2*t*t-0.5*a1*t*t=0.75*t*t=L=0.75
t=1s
s(滑块)=0.5*a1*t*t=0.5*2=1m
所以
答:(1) 经过1s能从滑块下抽走.
(2) 滑块向前运动了1m.
因为是光滑水平面.
唯一的阻力f=mgu=0.5*10*0.2=1N (对于小滑块是动力)
a1=f/m=1/0.5=2m/(s*s)
a2=(F-f)/M=3.5/1=3.5m/(s*s)
s(M)-s(m)=0.5*a2*t*t-0.5*a1*t*t=0.75*t*t=L=0.75
t=1s
s(滑块)=0.5*a1*t*t=0.5*2=1m
所以
答:(1) 经过1s能从滑块下抽走.
(2) 滑块向前运动了1m.