physical science formulas and SI units
SI unit for force
Newton
power
POWER = WORK/ TIME
Formula for the IMA of a wheel and axle
Radius of wheel / radius of axle
prefixes for metric system
deci. centi. milli. deca. hecto. kilo.
velocity
distance/time
what is potential energy
energy due to position
what is gravitational potential energy
energy due to postition
what is chemical energy
energy stored in chemical bonds
what is elastic potential energy
energy stored in something that can stretch or compress
formula for acceleration
final velocity - initial velocity/time
3 types of pulleys
fixed movable block and tackle
force
force = mass x acceleration
SI unit of energy
joule
SI unit for momentom
kg x m/s
SI units for Mass
kilogram
SI unit for displacement
kilometer
SI unit for speed
m/s (meters per second)
SI unit for distance
meter
Si unit for displacement
meter
SI unit for speed and velocity
meter per second
SI unit for length
meter(m)
SI unit for amount of a substance
mole (mol)
SI unit for force and weight
newton
momentum
p(momentum)= Mass x Velocity
name 3 types of graphs and their purpose
pie - shows % line - shows difference over a period of time bar- compares information
SI unit for time
second
Si unit for Time
second (S)
in a distance over time graph the slope shows
speed
speed
speed= distance/time s=d/t
what is kinetic energy
the energy an object has do to its motion
what is the IMA of a block and tackle
the number of rope segments
milli
.001
centi
.01
deci
.1
what is the IMA of a fixed pulley
1
define 1st 2nd and 3rd class levers and give an example
1 - fulcrum in middle - screw driver 2 - output force in middle - wheel barrow 3 - input force in middle - baseball bat
deca
10
hecto
100
kilo
1000
what is the IMA of a movable pulley
2
SI unit for power
watt (j/s)
weight
weight= mass x gravity (9.8)
work
work= force x Distance
Kinetic energy
KE =1/2 mv squared
mechanical energy
KE+ PE
SI unit for temerature
Kelvin (k)
SI unit for mass
Kilogram (kg)
Formula for the IMA of a lever
Length of the input arm / Length of output arm
Formula for the IMA of an inclined plane
Length/Height of slope
efficiency
Wout / Win x 100
slope in a velocity time graph indicates
acceleration
SI unit fir electric current
ampere (A)
SI unit for intensity of a light
candela (cd)
