# Selina Solutions Class 9 Physics Solutions for Exercise 3A in Chapter 3 - Chapter 3 Laws Of Motion

Question 4 Exercise 3A

(a) A ball is hanging by a string from the ceiling of the roof. Draw a neat labelled diagram showing the forces acting on the ball and the string.

(b) A spring is compressed against a rigid wall. Draw a neat labelled diagram showing the forces acting on the spring.

(c) A wooden block is placed on a tabletop. Name the forces acting on the block and draw a neat and labelled diagram to show the point of application and direction of these forces.

(a) The diagram shows the forces acting on the ball and the string

(b) The diagram shows the forces acting on the spring

(c) The diagram shows the point of application and the direction of these forces

The following are the forces that act on the block

· Reaction force from the table in the upward direction

· Weight of the block in the downward direction

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