Question

1) List two types of friction
2) Define viscosity
3) State one advantage and one disadvantage of friction

Answer 1

Answer:

1) There are two main types of friction, static friction and kinetic friction. Static friction operates between two surfaces that aren't moving relative to each other, while kinetic friction acts between objects in motion.

2) If I fill the same cup with water, for example, the cup will drain much more quickly. Viscosity is a measure of a fluid's resistance to flow. It describes the internal friction of a moving fluid. A fluidwith large viscosity resists motion because its molecular makeup gives it a lot of internal friction.

3) The force of friction acts in the opposite direction of motion, so friction slows down the motion of moving objects. Forest fires are caused due to the friction between tree branches. A lot of money goes into preventing friction and the usual wear and tear caused by it by using techniques like greasing and oiling.

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Explanation:

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