sp15 forces and matter (paper 2) Flashcards
1
Q
define elastic
A
distortion is reversed when the force is removed
2
Q
define inelastic
A
distortion is not fully reversed when the force is removed, there is a permanent change in shape
3
Q
what is the spring constant
A
- measure of the stiffness of the spring or material
- higher = stiffer (needs a larger force for a bigger extension)
4
Q
what can change the spring constant
A
adding springs in series or parallel
5
Q
what does an object need to be to obey Hooke’s law
A
directly proportional to the applied force
6
Q
equation for Hooke’s law
A
force (N) = spring constant (N/m) x extension (m)
7
Q
how many newtons in a kilonewton
A
1000
8
Q
how many kilonewtons in a newton
A
0.001
