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Newtons 3rd law+Horse Cart System+Action/Reacton..help needed ASAP!
im a sophmore in the ib program and I'm in conceptual physics
i have a test tommorow on Newtons third law and all the stuff that goes along with it.. so i need an answer on this pronto!
first of all.. if you are standing still.. is the considered an action/reaction force? i thought it was.. because the Earth exerts a force up on you and you exert a force down on the earth..? but for some reason, my friend said it wasn't.. and i don't know..?
then i have a question on the horse-cart system.. idk if you know of this but its an example found in a lot of textbooks.. and it shows a horse attatched to a cart and the horse says 'I cannot accelerate this cart because the forces are equal and opposite of me and the cart and will cancel to zero'.. well i know that's not true.. but why.. and i also need to know..
a)what makes the cart accelerate
b)what makes the horse accelerate
c)what makes the horse-cart system accelerate
i need someone who KNOWS for SURE about this.. please do not give me a bogus answer and make me fail my test tommorow!
im a sophmore in the ib program and I'm in conceptual physics
i have a test tommorow on Newtons third law and all the stuff that goes along with it.. so i need an answer on this pronto!
first of all.. if you are standing still.. is the considered an action/reaction force? i thought it was.. because the Earth exerts a force up on you and you exert a force down on the earth..? but for some reason, my friend said it wasn't.. and i don't know..?
then i have a question on the horse-cart system.. idk if you know of this but its an example found in a lot of textbooks.. and it shows a horse attatched to a cart and the horse says 'I cannot accelerate this cart because the forces are equal and opposite of me and the cart and will cancel to zero'.. well i know that's not true.. but why.. and i also need to know..
a)what makes the cart accelerate
b)what makes the horse accelerate
c)what makes the horse-cart system accelerate
i need someone who KNOWS for SURE about this.. please do not give me a bogus answer and make me fail my test tommorow!