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Such work - the product of force and a distance - is simply called "work". It is actually a kind of energy.
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∙ 10y ago
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when work is done on a system by an external force, the system?
When work is done by an external force, the system will have more energy in it than it did before.
What is the mechanical advantage of using machines?
Mechanical advantage is the ratio of output force to input force. In other words, F out/F in. Output force is the work done by the machine while input force is what the host (you) did to the machine. Work is always displayed with the label of joules.
Work is done when?
work= force × distance so if an object moves 4metres, and the force to move it is 2N, (Newtons) the work done would be 4 × 2 = 8Joules (Work is measured in Joules) In other words, work is done when an object moves a certain distance when a certain amount of force is applied to it.
When you rub your hands together on a cold day you use friction to convert what energy?
The friction force converts mechanical energy of the body into heat energy that is released. Work done by mechanical energy=Force x displacement =Heat produced.
Why is an elevator an example of Mechanical energy?
Because it raises loads against the force of gravity, the energy produced, which is the same as the work done, is Force x Distance. The downward force on any mass M is MG Newtons, so the work done in raising it a height H meters is MGH Joules.
Is holding an egg mechanical energy?
No mechanical energy is needed to hold up an object. Mechanical work (transfer of energy) is done when applying a force over a certain distance. Don't confuse force and energy (or force and work).
What the realationsip between work and mechanical energy?
I think it helps to think - informally - of work as the "transfer of energy". Work is said to be done when you apply a force along a certain distance; and energy is required to do this work. The work done on the system may increase the system's potential energy, or - if done against a force of friction - it may increase its heat energy.
What is the increase in work done by a lever called?
Mechanical advantage .
Why is liquid used in a car's braking system?
Liquids aren't compressible. Means the force/movement done at the pedal get transferred very efficiently to the brake. No slack or stretching as you get in mechanical systems.
when work is done on a system by an external force, the system?
When work is done by an external force, the system will have more energy in it than it did before.
When mechanical work is done on a system there is an increase in what?
both temperature and internal energy
What is the mechanical advantage of using machines?
Mechanical advantage is the ratio of output force to input force. In other words, F out/F in. Output force is the work done by the machine while input force is what the host (you) did to the machine. Work is always displayed with the label of joules.
Work is done when?
work= force × distance so if an object moves 4metres, and the force to move it is 2N, (Newtons) the work done would be 4 × 2 = 8Joules (Work is measured in Joules) In other words, work is done when an object moves a certain distance when a certain amount of force is applied to it.
When you rub your hands together on a cold day you use friction to convert what energy?
The friction force converts mechanical energy of the body into heat energy that is released. Work done by mechanical energy=Force x displacement =Heat produced.
What force is not path-dependent and does not change the overall mechanical energy of an object?
A conservative force is not path dependent. A conservative force is a force with the property that the work done in moving a particle between two points is independent of the taken path.
Still other machines allow you to change the direction of the input force resulting in a mechanical advantage equal to one?
Yes, sometimes a pulley is used just to change the direction of the force, rather than to create a mechanical advantage. This can also be done with gears.
What is to done when a force moves the object through a distance?
Basically, the product of force x distance is called "work". It is expressed in units of energy. I like to think of work as "energy transfer", but this only applies to mechanical energy. In fact, it requires energy to do such work. In the SI, if you multiply a distance in meters by a force in newtons, you get a work in joules.
