Calculating Net Work with Friction on a Long Shish Kebab Delivery

AI Thread Summary
To calculate the net work done on the cart during the delivery of the 881.0 m shish kebab, the applied force of 40.00 N at a 45° angle must be resolved into its horizontal component, using cosine for the x-direction. The friction force of 28.00 N must also be considered, as it opposes the motion. The net force is determined by subtracting the friction force from the horizontal component of the applied force. The net work is then calculated by multiplying this net force by the distance traveled. It's essential to account for all forces to accurately determine the net work done.
duckywucky
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Homework Statement



The longest shish kebab ever made was 881.0 m long. Suppose the meat and vegetables need to be delivered in a cart from one end of this shish kebab’s skewer to the other end. A cook pulls the cart by applying a force of 40.00 N at an angle of 45.00° above the horizontal. If the force of friction acting on the cart is 28.00 N, what is the net work done on the cart and its contents during the delivery?

Homework Equations





The Attempt at a Solution



Would i use the formula: Wnet = Fnet(d)(Cos)? If so, then what do i look for?!
 
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Since the force applied is constant, it is a simple equation of W=F*d. You do need to be careful that you are using the correct force. Remember that you need the force in the direction of motion.
 
So how would i set up the formula?
W = (40.0N)(...)
 
It is not 40N because that is the force at 45 degrees to the direction of motion. You want the force in the direction of motion. So first you need to find whether you multiply 40 by sin or cos. Which one gives you the x component? Then multiply by the distance you need to travel.
 
Okay, that helps!
What would i do with the friction force?!
 
duckywucky said:
Okay, that helps!
What would i do with the friction force?!
The problem is asking for the NET work done. That includes the work done by ALL forces. Calculate the work done by ALL forces to find the net work done.
 
Sorry. I missed the part about the friction. In which case, do what PhantomJay said.
 
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