A 5 N (about 1 lb) apple falls to the ground. While falling, it accelerates at t

Question

A 5 N (about 1 lb) apple falls to the ground. While falling, it accelerates at the rate

of 9.8 m/s/s. Consider the pull exerted by the Earth on the apple the action force.

1.

How big is that action force?

2.

What is the reaction force here?

3.

How big is the reaction force?

4.

Theoretically, what effect does the reaction force cause?

Arnold and Suzie are having a tug of war on a sandy beach. Arnold wins hands down, of course.

6. Who is pulling harder on the rope? 7. Explain how come Arnold wins? Hint imagine that Arnold and Suzie played the tug of war on a very slippery frozen lake. What would had happened then? Now back to the beach who is pushing harder against the sand

Explanation / Answer

1.The action force is the force exerted by the earth on the apple the action force is 5 N.

2. the reaction force is the force exerted by the apple on the earth, using Newton´s third law

of motion

3. Using Newton´s third law of motion Freaction =-5N

4. Newton´s second law of motion estates F=Ma so the earth should get accelerated a=F/M(earth) so is very very small

___________________________________________________________________________________

Nwton´s third law states the forces are equal but in opposite directions therefore are acting on different objects

therefore Farnold=Marnols*aarnold, Fsuzie=Msuzie*asuzie, but as Farnold=Fsuzie but they are acting in opposite directions, If Marnold is larger than Msuzie, hence aarnold is muuch smaller than asuzie

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