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What cannot be done by a simple machine?
Increase Work
What happens to internal energy when mechanical work is done?
Increase.
How much work must be done on a 5kg snowborad to increase its speed from 2ms to 4ms?
1500 j
What is the relationship between the work done while moving a book to a higher bookshelf and the change of potential energy?
It is the same - work done is weight x height and potential energy change is the same at the new height
What happens to the internal energy of a system when work is done on it?
If the internal energy of the system increases the temperature will increase.
What cannot be done by a simple machine?
Increase Work
What are the two ways in which you can increase the amount of work done?
By increasing the distance also increasing the amount of work done
What happens to internal energy when mechanical work is done?
Increase.
What is the increase in work done by a lever called?
Mechanical advantage .
If work is don adiabatically on a system will the internal energy increase or decrease?
If work is done adiabatically on a system, the internal energy will increase. This is because adiabatic processes do not involve the exchange of heat with the surroundings, so any work done on the system will directly contribute to an increase in its internal energy.
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.
When mechanical work is done on a system there is an increase in what?
both temperature and internal energy
What is added to an object when work is done on it?
In that case, the object's energy should increase.
How much work must be done on a 10kg bicycle to increase its speed from 2 M's to 3 M's?
Work done = increase in kinetic energy ie 1/2 * 10 * (3+2)(3-2) [recall a2 - b2 = (a+b)(a-b)] Hence work done = 25 joule.
How does technology help to increase productivity?
technology is all about innovations to get the work done in simpler and faster way.so as the work goes on being completed faster the productivity will itself increase.
What happens to power as the time required to do work Does power increase or decrease?
Yes; power= work/time, or work per time, measured in watts.
How much work must be done on a 5kg snowborad to increase its speed from 2ms to 4ms?
1500 j
