Which factors affect friction between two solid surfaces? check all that apply. the weight of the objects the surface area of the objects the shape of the objects the roughness of the objects’ surfaces

Explain vector addition, triangle method and parallelogram method

If y gets smaller as x gets bigger and y have an relationship?

Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.