Question

A GU physics student uses a broom to push her physics textbook along the floor. Which of the following forces would be included in the free-body diagram of the book? [The broom does not touch the floor; it touches only the book.]
True/False:

the force applied by the GU physics student

the force applied by the broom

the force applied by the floor

the force applied by the Earth

the force applied by the book

All of the above forces would be included in the free-body diagram of the book.

Answer 1

Force from Earth= Normal Force.

Answer 2

So I think that is included in the free body diagram and it points towards the top.

Answer 3

The force from gravity and that comes from the book.

Answer 4

And I think the third is from either from the broom or the physics students.

Answer 5

I'm leaning towards the student because that's the source of the force.

Answer 6

so the broom force is hte only one not included?

Answer 7

and the floor.

Answer 8

what about normal force?

Answer 9

I don't know if you know if you have learned this but the gravity requires two objects. in this case it's Earth and the book so the book applies a force to the earth and vice versa (newton's third law) The force from Earth is the normal force and it same way as the student holding the broom , the floor is simply the medium between the book and the earth where the earth is the source of the force. Again the broom is the medium and not the source.

Answer 10

ah thanks, that helps my understanding greatly...I've been confused about it

Answer 11

Yeah I took physics and this part confused me a lot. Just keep doing more example and you will get the hang of it.