Final answer:
The question is asking to use a specific value for the cart's coefficient. The coefficient is not specified, so it's unclear what exactly it refers to. More information is needed to provide a more detailed answer.
Step-by-step explanation:
The question is asking to use the value 0.00300 for the cart's coefficient. It is not clear what the specific coefficient is, but assuming it is a friction coefficient for the motion of the cart, we can use it to calculate the frictional force. The frictional force can be found by multiplying the coefficient by the normal force acting on the cart. If you provide more context or specify the specific coefficient you are referring to, I can provide a more detailed answer.