Newton's Third Law & Action-Reaction Pairs Video Lessons

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Problem: According to Newton's 3rd law, the force on the (smaller) moon due to the (larger) earth isa) greater in magnitude than, and in the opposite direction from, the force on the earth due to the moon.b) greater in magnitude than, and in the same direction as, the force on the earth due to the moon.c) equal in magnitude to, and in the opposite direction from, the force on the earth due to the moon.d) equal in magnitude to, and in the same direction as, the force on the earth due to the moon.e) smaller in magnitude than, and in the opposite direction from, the force on the earth due to the moon.f) smaller in magnitude than, and in the same direction as, the force on the earth due to the moon.

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Action and reaction forces are equal but act in opposite directions.

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Problem Details

According to Newton's 3rd law, the force on the (smaller) moon due to the (larger) earth is

a) greater in magnitude than, and in the opposite direction from, the force on the earth due to the moon.
b) greater in magnitude than, and in the same direction as, the force on the earth due to the moon.
c) equal in magnitude to, and in the opposite direction from, the force on the earth due to the moon.
d) equal in magnitude to, and in the same direction as, the force on the earth due to the moon.
e) smaller in magnitude than, and in the opposite direction from, the force on the earth due to the moon.
f) smaller in magnitude than, and in the same direction as, the force on the earth due to the moon.

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Based on our data, we think this problem is relevant for Professor Piatek's class at New Jersey Institute of Technology.