問題一覧
1
is the tendency of an object to resist changes in its state of motion",
Inertia
2
magnitude only. Like mass, time, temperature
Scalar quantity
3
For every action there is an equal and opposite reaction
Newton's Third Law
4
ax = a cos o ay, = a sin o
Components of Vectors
5
f x d/t
power
6
"A net force acts on an object produces an acceleration (a change of motion of the object)"
Newton's Second Law
7
Fg is the force that the earth exerts on an object.
Gravitational Force
8
g=¿¿
9.8
9
Derived Quantities
All other quantities
10
Work = force x displacement x0
Forth case of work
11
Work = force x displacement × cos
First Case of work
12
balanced
equal and opposite
13
Basic Quantities
Length mass Time
14
in opposite direction
Third case of work
15
unbalanced
not equal and opposite
16
is an action that can change motion.
force
17
exactly equal 1
dimensionless
18
is the energy possesses by a moving object of mass m and speed v.
Kinetic Energy
19
are in the same direction
Second case of work
20
is the rate of work done.
power
21
magnitude and direction. Like velocity, force, acceleration.
Vector quantity
22
is the energy spent to move an object a distance by applying force
work
23
does not change the size of the physical quantity but just change the name of its unit
Conversion
24
Work, =- (force x displacement)
Third case of work
25
PE = mx 9 xh
Potential Energy
26
Work = force x distance
Second case of work
27
is the stored energy in an object of mass m and at height h above earth surface.
Gravitation Potential Energy
28
Classes of Forces
Contact, Field
29
An object at rest tends to stay at rest and an object in motion tends to stay in motion unless acted upon by an unbalanced force"
Newton's First Law
30
KE = ½ mv (Joule)
Kinetic Energy