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)