FRICTION & GRAVITY QUESTIONS AND ANSWERS | LATEST UPDATE | GRADED A+

FRICTION & GRAVITY QUESTIONS AND ANSWERS | LATEST UPDATE | GRADED A+ What is friction? The force that resists the movement of two surfaces sliding past each other. Name two factors that can influence friction. 1) The amount of force pressing the surfaces together. 2) The characteristics of the surfaces in contact. How does the direction of friction compare to the motion of an object? Friction acts in the opposite direction to the movement of the object. What is static friction? The frictional force that prevents stationary objects from moving. What is sliding friction? The resistance that occurs when two solid surfaces slide over one another. 2 What is rolling friction? The force that resists the motion when an object rolls on a surface. What is fluid friction? The resistance encountered by an object moving through a fluid (liquid or gas). Define gravity. A force that attracts objects toward each other due to their masses. What does the law of universal gravitation state? It states that every mass exerts an attractive force on every other mass. What are the factors that affect the strength of gravitational force? 1) The masses of the objects involved. 2) The distance between the objects. How does increasing mass affect gravitational force? 3 Increasing the mass of an object