1. If the sum of m terms of an A.P. is the same as the sum of n terms, then what is the sum of mn tems?
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2
Answer:
=
m
F−μmg
m
F
a
1
=
m
F
=
10
80
=8 m/s
2
a
2
=
m
F−μmg
=
10
80−0.2×10×10
=6 m/s
2
∴
a
2
a
1
=
6
8
=
3
4
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