Table of Contents
- 1 Is more or less work done when using an inclined plane?
- 2 How does using a ramp make lifting a heavy object easier?
- 3 Why use a ramp if it requires the same amount or more work as lifting the mass up to the same height?
- 4 How much force does it take to lift an object?
- 5 Do ramps decrease work?
- 6 What is the difference between going up and down an incline?
- 7 What is the difference between a ramp and a stair?
Is more or less work done when using an inclined plane?
Friction causes the work to move the object with the inclined plane to be greater than the work needed to lift it the same vertical distance.
Does it take more force to lift or slide an object?
So, if an object resting on a surface has a weight w then the normal reaction force would be w in the upward direction. Now, if you apply an external force of a magnitude w in the upward direction then the normal reaction force from the surface would reduce to zero.
How does using a ramp make lifting a heavy object easier?
A ramp is an example of an inclined plane. Using an inclined plane makes it easier to move an object. It takes less force to move an object in an upward direction on an inclined plane than it does to lift the object straight up. Moving the object up an inclined plane requires moving it an increased distance.
Why is it easier to push a heavy box up a ramp compared to lifting it straight up?
The output work is always less than the input work because some of the input work is used to overcome friction. It is easier to push the heavy piece of furniture up the ramp to the truck than to lift it straight up off the ground, but pushing the furniture over the surface of the ramp creates a lot of friction.
Why use a ramp if it requires the same amount or more work as lifting the mass up to the same height?
More work is needed to overcome the friction of the ramp. The height difference is the same in both cases, so the work is the same.
Why do machines need less force to do the same amount of work?
The work output can never be greater than the work input. How do machines decrease the amount of force needed to accomplish work? Machines apply force over a greater distance, so less force is needed. Because some of the input work is always used to overcome friction in moving parts.
How much force does it take to lift an object?
The amount of force required to lift an object is equal to the amount of force required to counteract gravity. Assuming the acceleration due to gravity is −9.8ms2 , we can use Newton’s second law to solve for the force of gravity on the object.
How does a ramp reduce the amount of work?
Recall that work is the use of force to move an object. If, for example, you have to lift a heavy box, you can use a ramp to make the work easier. Moving the box up a ramp—which is a machine—helps you do the work by reducing the force you need to lift the box.
Do ramps decrease work?
Answers and Replies It does come down to work, but it doesn’t make it easier; it merely spreads it over time. No matter what mechanism is involved, you are never going to get off easily.
What is the relationship between work and a ramp?
(Hint: The work done to move the cart up the ramp is Fl (the force times the length of the incline – force times distance), and the work done to raise the cart to the same height directly is Wh (weight of the cart times height lifted – also force times distance).)
What is the difference between going up and down an incline?
If you go up and down an incline with a a constant speed, you are doing same amount of work, while going up to go up against gravity and while coming down to keep your speed from increasing. Now coming to steps, while going up, we need to push ourselves to go up]
Why is the horizontal work less than the vertical work?
As far as Cf remains less than 1 (practically always), F will be less than W, consequently as work (or energy) E=F x L (L: lenght), horizontal work will remain less than the vertical. Try it out. It takes more force to lift because you are moving all the weight up.
What is the difference between a ramp and a stair?
A ramp and stair serve the same function to get you up or down. The ramp makes access to heights possible for wheelchairs: a stair cannot serve that function. You can slip and hurt yourself on a stair: you can do the same on a ramp. In icy conditions a ramp and stair can pose the same safety concerns if they are slippery.
Why does it take more energy to pick up an object vertically?
But if the surface is rough, the force of friction is greater, and you’ll expend more energy trying to move it. Depending on the surface, it might actually take more energy to push the object laterally than it would to pick it up vertically.