click below
click below
Normal Size Small Size show me how
Ch 8 Questions
Question | Answer |
---|---|
Work is... | The transfer of energy to an object by using force that causes the object move into the direction of the force |
What is kinetic energy | energy in motion |
Work only occurs when... | The object must move in the same direction as the force |
What 2 things happen for work to be done | the object move the same direction as the force, |
Explain how both sets of climbers are using the same amount of work even though one is climbing up the mountain and the others are walking up | The work is equal to fxd |
Joule is... | the si unit for newtons x second |
What is the power formula | P=t/W |
Watt is... | unit that expresses power |
"Now its your turn"Questions | 1)15 2)100 |
Machine is... | a device that makes work easier by changing distance, direction, or force |
Work output is... | The work you do on the machine |
Work input is... | Work done by the machine |
"Standards check" | Machines make less force, or distance |
How do machines make work easier | Machines allow more distance less force and vise versa |
The ramp allows a smaller ___ to be applied but requires the force to be applied over a longer ___________ | Force,distance |
Mechanical Advantage is... | Mechanical Advantage is the number that tells how many times the machine multiply the force |
Formula for MA | output force/input force |