- #1
anna sung
- 46
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Homework Statement
a grocery cart is being oused with a force of 450 N at an angel of 30degree to the horizontal. if the mass of the cart and groceries is 42kg.
a) calculate the force of friction if the coeffcient of friction is 0.60.
b) determine the acclecration of the cart.
Homework Equations
a) it is the 30 degree angel from the handle to the cart.
but i don't understand why you need to do 450sin(30) and add it by Fn=412.02N
The Attempt at a Solution
Ff= muFn
450sin (30)= 225N
Fn=mg
Fn= (42)(9.81)
= 412.02N
Fn= 225N + 412.02N
Fn= 637.02N
ff= 637.02N * 0.60
= 3.8 x 10^2 N
i got the answer but why do u need to find the vertical component and add it to Fn . what does the vertical component represent? and why does this give you FN?
please help me :-)