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A machine that only changes the direction of a force has a mechanical advantage of _____
multiply energy
toward the adult
30 watts
friction
1
Work input is less than work output.
the fulcrum is in between the effort and resistance forces
time
Power is work done over _____
multiply energy
toward the adult
30 watts
friction
1
Work input is less than work output.
the fulcrum is in between the effort and resistance forces
time
In an ideal machine which of the following is true?
multiply energy
toward the adult
30 watts
friction
1
Work input is less than work output.
the fulcrum is in between the effort and resistance forces
time
How much power does a person weighing 500N need to climb a 3 m ladder in 5 s?
multiply energy
toward the adult
30 watts
friction
1
Work input is less than work output.
the fulcrum is in between the effort and resistance forces
time
An adult and a child are on a seesaw, when the fulcrum is in the middle the child can not move the adult. How should the fulcrum be moved so the two can seesaw?
multiply energy
toward the adult
30 watts
friction
1
Work input is less than work output.
the fulcrum is in between the effort and resistance forces
time
In a first class lever
multiply energy
toward the adult
30 watts
friction
1
Work input is less than work output.
the fulcrum is in between the effort and resistance forces
time
Which of these cannot be done by a machine?
multiply energy
toward the adult
30 watts
friction
1
Work input is less than work output.
the fulcrum is in between the effort and resistance forces
time
Some of the energy put into a machine is changed into heat because of _____
multiply energy
toward the adult
30 watts
friction
1
Work input is less than work output.
the fulcrum is in between the effort and resistance forces
time
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