CH 8 - PHYSICS Flashcards
(11 cards)
1
Q
scalar vs vector
A
s: only includes magnitudes (size)
eg ℃, km/h, time
v: Magnitude & direction
eg velocity
2
Q
velocity
A
- how fast object change position in CERTAIN DIRECTION
- displacement/time
3
Q
speed
A
- how fast object change position over time
- distance/time
4
Q
distance vs displacement
A
dist: actual path travelled by object
disp: how far obj. from og pos.
5
Q
newts 1st law
A
- Law of Inertia
- object remain current state unless acted upon by unequal force
6
Q
newts 2nd law
A
- Law of Motion
- f = m * a
- f in Newton, m in kg, a in m/s^2
7
Q
newts 3rd law
A
- Law of Forces
- Every action has an equal opposite reaction
8
Q
acceleration
(formula, measure, quantity)
A
- rate which obj change speed
- change in V (m/s) / time (t)
- m/s^2
- Vector
9
Q
force
A
- interaction bet. 2 forces
- Newtons (N)
10
Q
inertia
A
property of obj resist change in motion
11
Q
weight
(quantity, form. measure)
A
-force of grav att. on an obj towards a huge bod
- vector
- Fg = mg (fg force from grav, m mass, g grav field strength)
- Newt
