2. What is the difference between contact and non-contact forces? Explain with the help of one
example of each.
3. What is friction? Explain with an example.
4. Why are caterpillar tracks used in battle tanks instead of tyres?
Answers
Answer:
contact force is the force in which an object moves by touching it . example pushing a car
non contact force is the force in which an object moves without touching it . example earth's gravity
friction is the force that resist the relative motion of objects
Explanation:
Answer:
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 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
Friction is a force between two surfaces that are sliding, or trying to slide, across each other. For example, when you try to push a book along the floor, friction makes this difficult. Friction always works in the direction opposite to the direction in which the object is moving, or trying to move.
Explanation:
sorry baya I don't know about 4th question