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Question
The physics books are stacked on each other in the sequence: +1 volumes 1 and 2; +2 volumes 1 and 2 on a table.
a) Identify the forces acting on each book and draw the free body diagram.
b) Identify the forces exerted by each book on the other.
Solution
Let m1, m2, m3, m4, are the masses of +1 volume I and II and +2 volumes I & II
| m4 |
| m3 |
| m2 |
| m1 |
(a) Force on book m4
- The downward gravitational force acting downward (m3g)
- Upward normal force (N3) exerted by book of mass m3
(b) Force on book m3
- Downward gravitational force (m3g)
- The downward force exerted by m4 (N4)
- The upward force exerted by m2 (N2)
(c) Force on book m2
- Downward gravitational force (m2g)
- The downward force exerted by m3 (N3)
- The upward force exerted by m1 (CN1)
(d) Force on book m1
- The downward gravitational force exerted by earth (m1g)
- The downward force exerted by m2 (N2)
- The upward force exerted by the table (Ntable)
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