Newton's Third Law?

Question

True or False? Given that two bodies interact via some force, the accelerations of these two bodies have the same magnitude but opposite directions. (Assume no other forces act on either body.)


and


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


a. greater in magnitude and antiparallel to the force on the earth due to the moon.


b. greater in magnitude and parallel to the force on the earth due to the moon.


c. equal in magnitude but antiparallel to the force on the earth due to the moon.


d. equal in magnitude and parallel to the force on the earth due to the moon.


e. smaller in magnitude and antiparallel to the force on the earth due to the moon.


f smaller in magnitude and parallel to the force on the earth due to the moon.

Answer 1

The FORCE of these two bodies have the same magnitude but opposite directions. but force = ma so false unless the masses are equal.

C

Answer 2

The forces are equal in magnitude but antiparallel (answer c). Acceleration is a = F/m (force divided by mass), so the lighter body has a higher acceleration

Answer 3

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