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Physics 43 Online
Tattyspur:

Jose gets up from his seat on the bus to move closer to the front. Just as he begins to walk forward, the bus stops at a light. What is the best explanation of what happens to Jose? While Jose is walking, his body is in motion, but when the bus stops, an unbalanced force accelerates his body backward. While Jose is walking, his body is in motion, but when the bus stops, he continues to move forward due to inertia. While Jose is walking, his body is in motion, but as the bus stops, it exerts a force on Jose opposite to the direction he is walking, causing him to stop as well. While Jose is walking, he is in motion due to the force of repulsion. When the bus stops, he is catapulted forward due to the bus's stronger force of attraction.

Tattyspur:

pls hurry its important :(

AZ:

Any ideas? First let's eliminate some answer choices- think about this situation: You're in the car with your mom and she's driving you to school. You left the house late so she's speeding to get you there in time. While she's driving, all of a sudden a kid jumps into the street so your mom SLAMS the breaks. What happens to you? Do you move forward or do you fall backwards into the seat?

Tattyspur:

you move forward, then you slam back. but is it just inertia? what about the force of repulsion?

Tattyspur:

i think its either the second or fourth option...

AZ:

that's good progress!

AZ:

so do you know the definition of inertia? and what force of repulsion is?

Tattyspur:

ya. i know both. inertia is the force of resisting change of velocity.

AZ:

exactly force of repulsion or attraction has to do with electrical charges of two objects

AZ:

so what do you think the answer would be?

Tattyspur:

ohhhh so it would be the second?

AZ:

You got it!

Tattyspur:

okkyy thank you so much :)

AZ:

You're most welcome!

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