Procedure
Situation 1
1.Hang a pen by a piece of string as shown in figures 3a.
Q1 -is the pen at rest or in motion?
Q2 -are there forces acting on the pen? if yes draw the force.

You ay use arrows to represent these forces.
Situation 2
1.Place a book on top of a table as shown in figure 2b.
Q4 -is the book at rest or in motion?
Q5 -are the forces acting on the book ? if yes draw the forces acting on the book.
2.Let one member of group push the book in one direction and other member push it in the opposite direction at the same time with the same amount of push (force)
Q6 -Did the book move ? how will you make the book move.

2

Answers

2016-06-18T15:20:41+08:00
Q1. at rest
Q2.
Q4-at rest

Q6-no, then by shaking the table to make the force in motion.

1 3 1
ANSWER IN Q6. The book will move if the forces that move it from opposite direction are not equal.
2016-06-18T15:42:10+08:00
Q1.The pen is at rest
Q2.Yes,tension force(the force exrted by the string to the pen) and the force of gravity
Q4.The book is at rest
Q5.Yes.Normal force and the force of gravity
Q6.No.But it can move if it is pushed by one side only
3 3 3
ADDITIONAL ANSWER IN Q6. The book will move if the forces that move it from opposite direction are not equal.