Q.1.
2,4
Q.2.
Line is x=0
Q.3.
F1 on floor = Floor on F1 > F2 on 1 = F1 on 2 > F3 on 2 = F2 on 3 > F3 on 1 = F1 on 3
Q.4.
a long-range force
Q.5.
no
Q.6.
T2 = M2a+M2g
Q.7.
Newton's 1st lawNewton's 2nd law
Q.8.
5 N / table / book / downward
Q.9.
T1 = (M1+M2)a+(M1+M2)g
Q.10.
T2 = M2g
Q.11.
5N/ book
Q.12.
A rock is thrown horizontally; air resistance is negligible.
Q.13.
6