All posts by Elad Nahum

Biology General set

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Biology General Bundle

Bluetooth/USB Module
BLT-202

Light
logger sensor
NUL-204

Temperature
logger sensor
NUL-203

Infrared Thermometer
logger sensor
NUL-235

pH
logger sensor
NUL-206

Relative Humidity
logger sensor
NUL-207

Pressure
logger sensor
NUL-210

Conductivity
logger sensor
NUL-215

Salinity
logger sensor
NUL-228

Turbidity
logger sensor
NUL-231

Soil moisture
logger sensor
NUL-229

Dew-point
logger sensor
NUL-245

Anemometer
logger sensor
NUL-242

Electricity set

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Electricity Bundle

Bluetooth/USB Module
BLT-202
Photo gate small

Voltage
logger sensor
NUL-201

 Force small

Current
logger sensor
NUL-202

 motion small

mA Current
logger sensor
NUL-248
Force plate small

Light
logger sensor
NUL-204

 Rotary motion small

Magnetic fields
logger sensor
NUL-214

 Acceleration small

Charge
logger sensor
NUL-246

Rotary motion small

Resistance
logger sensor
NUL-249

Newton’s second law

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Newton’s second law

Measure cart velocity and calculate gravity within few steps.

Study the relationship between force, mass and acceleration.

Using the NeuLog motion sensor NUL-213 and the connectivity module BLT-202

Watch the video to see how NeuLog makes it simple

Find out where you can buy Neulog
Newton’s second law of motion was the first to define accurately the relationship between force, mass and acceleration. The acceleration is linearly proportional to the net applied force in the same direction. The net force is equal to the mass of the object multiplied by its acceleration:

F = m • a

According to Newton’s second law, the cart’s acceleration is equal to the force that gravity exerts on the mass hanger minus the friction force, divided by the total weight of the cart and the mass hanger (with the 50 g mass):
F = fgravity– ffriction


If you did not use the absolute value for the friction force and it is negative, add the gravity force (of the mass hanger) to the friction force (the F will stay the same).
M represents the mass of the cart (0.4 Kg with the slotted masses). m represents the mass hanger with the slotted mass (0.05 Kg).
mT = M + m
F = mT • aF
fgravity– ffriction = mT • aF
af = fgravity– ffriction / mT
fgravity = m • g
aF = ((m • g) – ffriction) /  mT

m = 0.05 Kg

M = 0.4 Kg

mT = 0.45 Kg

g = 9.8 m/s2

ffriction = 0.21N
mT = 0.45 Kg

aF calculated = ((0.05 Kg • 9.8 m/s2) –  0.21N) / 0.45 Kg  = 0.28 N / 0.45 Kg  = 0.62 m/s2


The calculated aF is very close to the measured aF
(0.62 m/s2 in our example)..

Find more experiment you can make with the Motion sensor

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