Past paper Q's Flashcards
1
Q
what is a first class lever?
A
A lever that has its fulcrum (point of support or axis of rotation) between the point of resistance (load) and the point of effort (applied force).
2
Q
list four properties of polylactic acid (PLA) that make it a useful material for medical implants
A
- high tensile strength
- biodegradable
- non- toxic in solid form
- resistant to chemicals
3
Q
what is a second class lever?
A
In second class levers the load is between the effort (force) and the fulcrum.
4
Q
what is a third class lever?
A
These are the levers in which the fulcrum is at one end and the load at the other with the effort (force) in the middle.
5
Q
what is an example of a first class lever?
A
scissors
6
Q
what is an example of a second class lever?
A
wheelbarrow
7
Q
what is an example of a third class lever?
A
tongs
