Selina Concise Physics Class 9 ICSE Solutions Laws of Motion
Motion Class 9. APlusTopper.com provides step by step solutions for Selina Concise ICSE Solutions for Class 9 Physics Chapter 3 Laws of Motion. You can download the Selina Concise Physics ICSE Solutions for Class 9 with Free PDF download option. Selina Publishers Concise Physics for Class 9 ICSE Solutions all questions are solved and explained by expert teachers as per ICSE board guidelines.
Solution 1S.
a. The forces which act on bodies when they are in physical contact are called contact forces.
Example: frictional force and force exerted on two bodies during collision.
b. The forces experienced by bodies even without being physically touched are called non-contact forces.
Example: Gravitational force and Electrostatic force.
Solution 2S.
Contact force: (a) frictional force (b) normal reaction force (c) force of tension in a string
Non-contact force: (d) gravitational force (e) electric force (f) magnetic force
Solution 3S.
a. Force exerted on two bodies during collision.
b. Magnetic force between magnetic poles.
Solution 5S.
The magnitude of non-contact force on two bodies depends on the distance of separation between them.
The force decreases as the distance of separation increases.
The force is inversely proportional to the square of the distance of separation.
Solution 6S.
The magnitude of gravitational force between two masses will become four times as gravitational force varies inversely as the square of distance of separation.
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