One or more external forces are exerted on each object enclosed in a dashed box

Question

One or more external forces are exerted on each object enclosed in a dashed box shown in the figure below. Identify the reaction to each of these forces. (Assume that (a), (b) and (c) occur on Earth while (c), (d) and (e) occur far from any outside gravitational influences.

Select all that apply!!! I only need help with A and B!

(a) the spring exerts a force (b) the wagon exerts a force -downward on the Earth -to the right on the wall -to the right on the handupward on the Earth -to the left on the wall -to the left on the hand -downward on the Earth due to gravitational attraction -upward on the Earth due to gravitational attraction -upward to the left on the handle -upward on the Earth due to contact -downward to the left on the handle -downward on the Earth due to contact
One or more external forces are exerted on each object enclosed in a dashed box shown in the figure below. Identify the reaction to each of these forces. (Assume that (a), (b) and (c) occur on Earth while (c), (d) and (e) occur far from any outside gravitational influences.

Explanation / Answer

a)

to the right on the wall

to the left on the hand

b)

upward on the Earth due to gravitational attraction

downward to the left on the handle

downward on the Earth due to contact

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