formulas Flashcards
1
Q
Gravitational potential energy
A
MGH
2
Q
Work done
A
Fd = Force x distance
3
Q
Power
(2 formulas)
A
work or energy converted
——– ————————-
Time taken time taken
4
Q
Kinetic energy
A
1/2 mv²
5
Q
Pressure
A
Weight/contact area
6
Q
weight
A
mg
7
Q
Acceleration formula
A
V-U/t
8
Q
Velocity
A
Change of displacement/ total time taken
9
Q
Speed
A
total distance/total time
10
Q
Resultant force
A
F= ma
ma is mass times acceleration
11
Q
Density
A
mass/vol
Which is m/v
12
Q
Refractive index formula
A
N = sin i/sin r
13
Q
How to calculate magnification
A
Image height / object height
14
Q
Define period
A
Time taken for 1 complete oscillation
15
Q
Force
A
F= Ma
16
Q
Critical angle
A
Sin c = 1/n
N= refractive index
17
Q
moment
A
force x perpendicular distance
18
Q
Voltage
A
V = IR
19
Q
Speed of sound
A
V=f 人
