A crane is lifting a 60 kg load at a constant velocity. Determine the tension force in the cable.

The tension force of the cable is 588 N

Explanation:

Net Force

The Second Newton's law establishes that the acceleration an object has depends on the net force through the equation:

F = m.a

If the net force is zero, then the acceleration is zero, and the object's velocity remains constant.

The crane lifts a 60 Kg load at a constant velocity. It means the net force acting on the load is zero.

There are two forces acting on the load: The weight of the load and the tension of the cable that holds it.

Since the net force is zero, both forces have the same magnitude:

T=588 N

The tension force of the cable is 588 N

most voltage drop calculators want the distance between the source and destination. then internally, they double it so both the source and return wires are calculated. but you need to know which distance the calculator uses so you're not half of what you should be or double what you should be.

most circuit breakers will not take a #6 directly, so the electrician will have to splice on a smaller pigtail. you also have to upsize the grounding wire when you upsized the ungrounded (hot) wire (see note in 250.122). this will preclude using most cable assemblies, as a cable with #6 copper will most likely only have a #10 grounding conductor. you need a #6 grounding conductor if the circuit is 20a. a #8 cable is no better, as it will have a #10 grounding conductor too. but most 20a breakers will take a #8 directly.

in your related post, you didn't say what type of load this is. if it is a light or heater, voltage drop won't be a big issue. if this is a motor, the current needs are huge at startup and the voltage drop can pose a problem. if this is a motor, knowing if the motor is under much load during startup will answer the voltage drop effect (a saw is easier to start than a compressor).

i think it would be 5