Chapter 1: Can You Recall? (1)

1. What are the effects of a force acting on an object?
When force is applied on any object, it can change the state of rest and cause displacement of the object. If the object is already moving, the applied force can bring it to rest. The force applied on a moving object can change the magnitude or direction of motion or both. Applied force can also bring about a change in shape of the object. This change in shape can be temporary or permanent. 2 Marks
2. What types of forces are you familiar with?
Gravitational force, Magnetic force, Muscular force, Frictional force, Mechanical force are some of the familiar forces. 1 Mark
3. What do you know about the gravitational force?
The gravitational force is a universal force and it acts not only between two objects on the earth but also between any two objects in the universe. 1 Mark
4. What are Newton’s laws of motion?
Newton’s Laws of Motion are as follows: Every inanimate object continues to be in a state of rest or of uniform motion in a straight line, unless it is acted upon by an external unbalanced force. The rate of change of momentum is directly proportional to the applied force and takes place in the direction of force. To every action, there is always an instantaneous, equal and opposite reaction. 1 Mark Each