3. Distinguish between contact and non-
contact forces.
Answers
CONTACT FORCE...
A contact force is any force that requires contact to occur. Contact forces are ubiquitous and are responsible for most visible interactions between macroscopic collections of matter. Pushing a car up a hill or kicking a ball across a room are some of the everyday examples where contact forces are at work.
NON-CONTACT FORCE...
A non-contact force is a force which acts on an object without coming physically in contact with it. The most familiar non-contact force is gravity, which confers weight. In contrast a contact force is a force applied to a body by another body that is in contact with it.
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Answer:
Forces in which two things interact with each other and apply force are called contact forces
ex. Friction, Muscular force
Forces in which two thing do not need to be in contact to apply force are called non contact forces
ex. Magnetic force