0
well, Einstein, you tell me
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
When you want to pull to lift something the main advantage of passing a rope upward and through a single pulley rather than just up over the branch of a tree is that the pulley?
The rope pulled over the branch is hampered by the rope's friction over the branch. The same rope pulled over a pulley is not affected by friction as the pulley wheel will turn as the rope is pulled.
How do you get the mechanical advantage of the pulley?
For a pulley, when is it that the mechanical advantage is greater than 1 and when is it that it is equal to 1? If a rope was hung over a pulley with unequal weights applied to both ends, the larger weight (77kg) would pull the lesser weight (30kg) upward, and so what would the mechanical advantage there be? The thing about this question is that if a rope were hung over a pulley and the tension at each point was the same (neglecting the mass of the rope and pulley), then how is it that if both ends of the rope point downward that the mechanical advantage becomes 2 (if there was just that one pulley)? Is the mechanical advantage any different if someone was applying a force to one end of the rope compared to gravity acting alone?
How do you get the mechanical advantage of a pulley?
For a pulley, when is it that the mechanical advantage is greater than 1 and when is it that it is equal to 1? If a rope was hung over a pulley with unequal weights applied to both ends, the larger weight (77kg) would pull the lesser weight (30kg) upward, and so what would the mechanical advantage there be? The thing about this question is that if a rope were hung over a pulley and the tension at each point was the same (neglecting the mass of the rope and pulley), then how is it that if both ends of the rope point downward that the mechanical advantage becomes 2 (if there was just that one pulley)? Is the mechanical advantage any different if someone was applying a force to one end of the rope compared to gravity acting alone?
What is the mechanical advantage of a combined pulley?
A ratio that is the number of falls of rope in the system, apart from the rope between head-pulley and winch or you.
What is the mechanical advantage of a simple pulley?
If the pulley is fixed to the ceiling and the rope passes over it, then the ideal MA is 1, but there's some friction loss in it. If one end of the rope is fixed to the ceiling and the load hangs from the pulley, then the ideal MA is 2.
What is directional advantage?
A change in direction that results from passing a rope through a pulley.
What is a directional advantage?
A change in direction that results from passing a rope through a pulley.
Anchor the rope at one end and arrange a movable pulley to achieve a mechanical advantage of 2 how much rope you pulled through the pulley?
2m
What is the answer to when you want to pull downward to lift something the main advantage of passing a rope upward and through a single pulley rather then just put over the branch of a tree is that?
it reduces friction
What size cable do you need to support 4000 pounds with four points of contact?
Using 6x19 fiber core steel rope, you need only 1/4" which has a breaking strength of 6,020 pounds. Each cable must be able to support the full weight of the load; however, shock loading also needs to be considered. With this in mind you should use 1/2" steel rope (23,600 pound) to lift/suspend this load.
How does a block and tackle work?
By mechanical advantage. The multiple lengths of rope divide the force needed to lift an object everytime the rope reverses direction thru a pully.
When you what to pull downward to lift something the main advantage of passing a rope upward and through a single pulley rather than just up over the branch of a tree is that the pulley?
Reduces friction
