N=mg-Fsin37=100-40*0.6=76N
f=uN=0.2*76=15.2N
ma=Fcos37-f=40*0.8-15.2=32-15.2=16.8N
a=1.68m/s^2
V=at 8.4=1.68*t t=5s
s=at^2/2=1.68*5^2/2=21m
N=mg-Fsin37=100-40*0.6=76N
f=uN=0.2*76=15.2N
ma=Fcos37-f=40*0.8-15.2=32-15.2=16.8N
a=1.68m/s^2
V=at 8.4=1.68*t t=5s
s=at^2/2=1.68*5^2/2=21m