Mechanical systems Flashcards
1
Q
give an example of a class 3 lever
A
A hockey stick
2
Q
give an an example of a class 2 lever
A
Wheel barrow
3
Q
Give an example of a class 1 lever
A
A see saw
4
Q
What is the formula for work
A
Force x distance
5
Q
What is the formula for mechanical advantage
A
output force/ Input force
6
Q
Why are perpetual motion machines(100 % efficiency machines) impossible
A
You always lose energy in conversion (often heat)
7
Q
How does pascals law work in hydraulics
A
liquids give equal pressure in all directions no matter the shape of the container. Changing area u can change force
8
Q
What is the meaning of hydraulic and pneumatic.
A
Hydraulic means liquid system
Pneumatic means gas system
