Which statement describes the relationship between
diagram x and y?
gravity attracts only larger objects toward one another.
gravity attracts larger objects only if they are close to
one another
if the masses of the objects increase, then the force
between them also increases.
if distance between the objects increases, then the
amount of force also increases.

Asimply means that over time there was some sort of change.

Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?

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.