1,
Vm=P/f
=80000/2000=40m/s
2,
F`-f=Ma
F`=4000N
P=F`V`
V`=20m/s
3,
p`=F`*V
=4000*5=20000W
4,
P-fV=FV
80000-2000*32=F*32
F=500N
a=500/2000=0.25m/s^2
5,
t=t1+t2
=(V/a)+(ΔEk+fs)/P
=20+35
=55S
1,
Vm=P/f
=80000/2000=40m/s
2,
F`-f=Ma
F`=4000N
P=F`V`
V`=20m/s
3,
p`=F`*V
=4000*5=20000W
4,
P-fV=FV
80000-2000*32=F*32
F=500N
a=500/2000=0.25m/s^2
5,
t=t1+t2
=(V/a)+(ΔEk+fs)/P
=20+35
=55S