Question

You and your best friend are trying to pull one another toward your respective dorm rooms. You're the stronger of the two and, with a mighty tug, you drag your friend into your room.

As you are pulling your friend toward your room, the force you exert on your friend is:

A) equal in amount to the force your friend exerts on you.
B) definitely equal to three times the weight of Spongebob Squarepants.
C) less in amount than the force your friend exerts on you.
D) greater in amount than the force your friend exerts on you.

Answer 1

A) equal in amount to the force your friend exerts on you.

Step-by-step explanation:

According to the Newton's third law of motion every action has equal and opposite reaction. Here both the bodies exert equal and opposite forces on each other but it is just that I am able to stop myself from getting pulled by a greater force of friction by applying more normal force on the ground.

As we know that the force of friction is given as:

`f=\mu.N`

where:

`\rm f=\ force\ of\ friction\\N=\ applied\ normal\ force\ to\ the\ ground\\ \mu=\ coefficient\ of\ friction`