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How does a pulley make work easier?
1) it doesn't. Work = force x distance. So a pulley that reduces force will also increase distance -but -it can reduce the force needed to move somethingthus making life easier.Answer:It depends on the number of pulleys and their arrangement. A single pulley does not change the force required to lift something. But, other pulley arrangements do. Four pulleys can be arranged into a thing called a block & tackle that can divide the force required to lift something by four. But, the rope must be extended four times as long to do this.
How much work must be done to lift the beam 290m?
force x distance force=9800n distance=250m 9800 x 250= 2450000 Mega Joutes
How work done against gravitational force?
Lift any object. Grav. force is acting down, you must apply an upward force to lift the object. Work is force applied through a distance, so work is done if you lift it, but not if you hold it still.
If an aircraft is flying horizontally then its weight must be balanced by what force?
Lift balances weight. Thrust balances drag.
Could all four pulleys be placed on the same quadrant or in 2 adjacent quadrants and still be in equilibrium?
In order for there to be equilibrium, or balance, within quadrants, pulleys must be on opposite sides of the quadrant. If there are four pulleys in the same quadrant, there can be no equilibrium, nor can there be equilibrium if four pulleys are in adjacent quadrants.
How does a pulley make work easier?
1) it doesn't. Work = force x distance. So a pulley that reduces force will also increase distance -but -it can reduce the force needed to move somethingthus making life easier.Answer:It depends on the number of pulleys and their arrangement. A single pulley does not change the force required to lift something. But, other pulley arrangements do. Four pulleys can be arranged into a thing called a block & tackle that can divide the force required to lift something by four. But, the rope must be extended four times as long to do this.
Why must you exert five times as much force to lift a mass of 5 kg as you must to lift a mass of 1 kg?
Because it's five times heavier of course !
The amount of force that you must use on an object to lift it is?
Any force greater than its weight.
How much work must be done to lift the beam 290m?
force x distance force=9800n distance=250m 9800 x 250= 2450000 Mega Joutes
How work done against gravitational force?
Lift any object. Grav. force is acting down, you must apply an upward force to lift the object. Work is force applied through a distance, so work is done if you lift it, but not if you hold it still.
A fixed single pulley that is used to lift a block does what?
The choices are:A. Doubles the force required to lift the blockB. Decreases the force required to lift the blockC. Makes the block easier to lift by changing the direction of the force needed to lift it.D. Decreases the force required and changes the direction of the force required
What best describes what must happen in order for a person to lift an object?
The force of gravity must be greater than the mass of the object
If you used 300 N of force to lift the fish using a pulley what is the mechanical advantage of the pulley?
You must also know how much the fish weighs. The idea is to divide the weight of the fish, by the 300 N of force you are applying. That will be the mechanical advantage.
If an aircraft is flying horizontally then its weight must be balanced by what force?
Lift balances weight. Thrust balances drag.
If a plane is flying at a constant speed and height is weight and lift equal?
If weight and lift aren't equal, then there's a net vertical force on the plane, and it must have vertical acceleration.
Which statements best describes what must happen in order for a person to lift an object?
The force of gravity must be greater than the mass of the object
How come an airplane floats in air?
Essentially there are 4 aerodynamic forces that act on an airplane in flight; these are lift, drag, thrust and gravity (or weight).In simple terms, drag is the resistance of air (the backward force), thrust is the power of the airplane's engine (the forward force), lift is the upward force and gravity is the downward force. So for airplanes to fly, the thrust must be greater than the drag and the lift must be greater than the gravity (so as you can see, drag opposes thrust and lift opposes gravity).This is certainly the case when an airplane takes off or climbs. However, when it is in straight and level flight the opposing forces of lift and gravity are balanced. During a descent, gravity exceeds lift and to slow an airplane drag has to overcome thrust.
