Problem 2 : While sitting in a coffee shop, you hear someone explaining Newton’s

Question

Problem 2

: While sitting in a coffee shop, you hear someone explaining Newton’s third law:

“Newton’s third law states that every force has an equal and opposite reaction force. This means

that if you ever see two forces that are equal in magnitude and opposite in direction, they must be

an action-reaction pair. For instance, look at this coffee mug. Gravity is pulling the coffee mug

downward, but this force is balanced by the equal and opposite force of the table pushing the mug

upward. Because these two forces are equal and opposite, they are an action-reaction pair.”

Are the two forces described here an action-reaction pair? If so, explain how you know. If not,what are

the reaction forces to the two forces described?

Explanation / Answer

Yes they are action reaction pair.

Due to Gravitational force mug need to be fall down, As it is kept on table it is applying a downward force on table. As a result table is applying an upward balancing force on the mug called normal reaction.

Weight of cup downwards and upward normal reaction applied by table are action reaction pair.

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