1.
F=ma
F1=430N;Ffr=110N
F=F1cos35°−Ffr=242.23N
m=m1+m2=11+30=41kg
a=mF=41242.23=5.9s2m
Answer: a=5.9s2m
2.
g=Gr2me
g′=G(r+h)2me
G=6.67384∗10−11
me=5.9722∗1024kg
r=6.371∗106m
h=60km=60000m
g′=6.67384∗10−11∗(6.371∗106+60000)5.9722∗1024=9.64s2m
Answer: g′=9.64s2m
3.
T=∣P∣
P=m(g+a)
a1=−2.2sm2
T1=5.5∗(9.8−2.2)=41.8N
a2=1.7sm2
T2=5.5(9.8+1.7)=63.25N
Answer: T1=41.8N;T2=63.25N
4.
F=ma=27∗2.82=76.14
F=F1−Ffr
Ffr=F1−F=110−76.14=33.86N
μ=NFfr=mgFfr=27∗9.833.86=0.13
Answer: μ=0.13
5.
a=g(sinα+μcosα)=9.8(sin20°+0.15∗cos20°)
a=4.73s2m
Answer: a=4.73s2m
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