- #1
walking
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- 8
- Homework Statement
- For part (c) author says F=ab when v=0. I don't see how since Fv=av(b-v^2) doesn't necessarily mean F=ab at v=0. In fact F can take any value?
- Relevant Equations
- Fv=av(b-v^2)
Author solution:
From a strictly mathematical perspective you are right, but it is reasonable to assume that F is a continuous function of v, so you can take the limit as v tends to zero.walking said:Homework Statement:: For part (c) author says F=ab when v=0. I don't see how since Fv=av(b-v^2) doesn't necessarily mean F=ab at v=0. In fact F can take any value?
Relevant Equations:: Fv=av(b-v^2)
View attachment 279836
Author solution:
View attachment 279837
Does this only work for continuous functions? If so why?haruspex said:From a strictly mathematical perspective you are right, but it is reasonable to assume that F is a continuous function of v, so you can take the limit as v tends to zero.
walking said:Does this only work for continuous functions? If so why?
We are told P(v), not F(v). If we do not assume F is continuous then it could beadd314 said:You can, obviously simplify it and you get
It's akin to Xeno's paradox.add314 said:If there is a deeper idea in it, tell me please.
It seems to me that the force of reference is the result of the initial torque from the electric motor, applied to the wheel(s), just before the trolley starts moving forward.add314 said:... But I'm wondering where the force equation comes from. And if this force exists what is this force at all, what it exerted to, and what it is equilibrated by? (the case when object does not move)
The force equation for power from a trolley motor is P = Fv, where P is power, F is force, and v is velocity. This equation states that the power produced by a trolley motor is equal to the force applied multiplied by the velocity at which the trolley is moving.
The force equation for power from a trolley motor is derived from the definition of power, which is the rate at which work is done. In this case, the work done is the force applied multiplied by the distance traveled, and the rate at which this work is done is equal to the velocity at which the trolley is moving.
The units for the force equation for power from a trolley motor are watts (W) for power, newtons (N) for force, and meters per second (m/s) for velocity. These units can also be expressed as joules per second (J/s) for power, kilograms meters per second squared (kg·m/s²) for force, and meters per second (m/s) for velocity.
The force equation for power from a trolley motor is directly related to the concept of mechanical work. This equation states that the power produced by a trolley motor is equal to the force applied multiplied by the velocity at which the trolley is moving. This is essentially the definition of mechanical work, which is the product of force and distance.
Yes, there are other factors that can affect the force equation for power from a trolley motor. These include the efficiency of the motor, the weight of the trolley, and any external forces acting on the trolley. These factors can impact the amount of power that the trolley motor is able to produce.