Newton's Second Law: Experiment

Newton's second law concerns the relationship between the resultant force on an object and the object's acceleration.
In this video I present an experiment to investigate this relationship. Some small masses are used to accelerate a trolley along a low friction track. The acceleration of the trolley can then be determined using the data from two photogates, which give the trolley's initial velocity, final velocity and the time taken. The acceleration can then be found using the formula:
acceleration = (final velocity - initial velocity)/time taken
Some points to note:
1) You will notice that one of the readings from the experiment failed to record correctly. I didn't spot this until later, when I came to edit the video. I decided to leave the "anomaly" in the video rather than going back and retaking the measurement.
2) I have used the approximation that g = 10 N/kg, although you may prefer to use the more accurate value of 9.8
3) An analysis of the data gives a value for the trolley mass that is too small. This is because the calculated accelerations are (surprisingly) slight too large. This is due to the way in which the photogates measure the time taken for the trolley to pass between them, which give a value for the time taken which is slightly too small.
This can be corrected for by either:
a) multiplying the time figures by about 1.05.
b) calculating the acceleration using the (slightly more advanced) formula:
v^2 - u^2 = 2as
where s is the distance between the photogates, which was approximately 0.33m

[@GuerrasLaws]

In physics, the word, “Force” as we know it, turns out to be nothing more than a description to describe an event or an expression to express an idea like one would use the word “Love” to express one's feelings. But, physics and in mathematics, still use “Force” as thou it were something physical that could enable the initial cause of motion making it counterintuitive. Example: Choose an object of your choices and without applying the energy from within you, try to push and pull by applying “only” the Force or Net Force. Meaning that Energy (applied energy) is the initial origin of motion and not “Force”. Once Energy (E) is applied, it creates what is known as Momentum (p). When this Momentum (mass and velocity) comes in contact with an object(s), it makes a surface contact that will enable you to push and pull. Example: Ep=ma, Ep=mc2 and so on. Note: Ep is not to be confused as Kinetic Energy in any way. Momentum represents things like work, wave, gravity, light, lightning, tsunami, radiation, earthquake, current, electricity, motion, magnetism, hurricane, etc. Without Energy, there is no Momentum. Without Momentum, there is no surface contact on an object(s) to push, pull, work, shaping objects, motion, gravity, magnetism, radiation, etc. Momentum does not and cannot exist without the applied Energy that creates it. Energy and Momentum or “Ep” is the one and only common denominator that links all fundamental forces of nature. Without Ep, all fundamental forces of nature would be inert and non-existence. ~Guadalupe Guerra c/s

[@VickySharma-wd7mg]

You are a genius teacher

[@martinsteen2878]

thank you very much for your prac i will now use this for my unit 2 outcome 1 assesment, kind regards bigsteen

[@DYtechnicalgyan]

Let's see when this gets recommended

[@ragedgamer3560]

Superb

[@yashchand8701]

Visualization make are concept esay thank you for your help Sir

[@shivamchouhan5077]

Thank you so much

[@physicslab5787]

Nice

[@rajatmohanta7629]

Could have kept the weight of the car fixed to start with though 👍🏼

[@QuantumBoffin]

The thing has to be kept the same is the mass of the car AND the weights. The reason for this is because they are both accelerating together.

[@rajatmohanta7629]

@@QuantumBoffin Now I understand ❤️😁 Thanks sir

[@yfusion9139]

PHYSICS is all about hypothesis, observation, theory and experiments [ the MOST important ]. I don't know how do they teach physics without it.