Science [ 5 Marks Questions ]

Motion:
The change of position of an object with respect to time is known as motion.

• Based on Path:

1. Linear motion. – Ex.: Parade of the soldiers.
2. Curvilinear motion. – Ex.: Paper flight moving.
3. Circular motion. – Ex.: Swirling stone tied to the rope.
4. Rotatory motion. – Ex.: Rotating top.
5. Oscillatory motion. – Ex.: Clock pendulum.
6. Zigzag (irregular) motion. – Ex.: Motion of a bee.

• Based on Duration:

1. Periodic motion. – Ex.: Motion of a bob of simple Pendulum.
2. Non periodic motion. – Ex.: Swaying of the branches of a tree.

• Based on Speed:

1. Uniform motion. – Ex.: Elour hand of a clock.
2. Non – uniform motion. – Ex.: Motion of a train, as it leaves a station.

Pull	Push	Push
Push	Pull	Push

Forces: Forces are push or pull by an animate or inanimate agency.
Types of Forces:

1. Contact forces;
2. Non – Contact forces.

1. Contact forces: The force that is executed by touching the body is a contact force Eg. Kicking the football
2. Non – Contact forces: The force is applied. Without touching the object then it is called noncontact force.
Forces can
(i) Change the states of the body from rest to motion or motion to rest.
(ii) Either change the speed or direction or both of the body.
(iii) Change the shape of the body.