Why are the action and reaction forces described by newton’s third law of motion excluded in the free-body diagram of an object?
a. they are equal and opposite, so they cancel one another.
b. they act on different objects, so they would not appear together.
c. they are in opposite directions, so only one would appear.
d. they do not happen at the same time, so only one would appear.

If a star is moving toward earth, it is

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 740 n/m. it is initially at rest on an inclined plane that is at an angle of theta= 26 with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is uk = 0.17. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. the block's initial mechanical energy is 9.472 j.b. if the spring pushes the block up the incline, what distance l in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Notice how they put future which of the clouds shown would indicate a possible future rain storm? a) b) c) d)