An experimental verification of Newton's second law
is the mass of the object, then the acceleration is given by string is massless (or of negligible mass) and there is no friction between the string and the pulley. Force is mass times acceleration, or F= m x a. This means an object with a larger mass needs a stronger force to be moved along at the same. Conclusion In the first experiment the relationship between mass, acceleration, and force was was determined. We used an accelerometer and force sensor to.
Relationships between acceleration, force and mass
A pulley system was set up in witch one end a motor was mounted and the other a set of weights. The motor pulled a string attached to the object causing it to rise at a specific acceleration depending on the objects mass. For the first part of the lab, we showed this by decreasing the mass of the object the object will be considered the weights and the stand in which they are placed.AQA GCSE Science Required Practical Acceleration
You will see based on our data that as the object became lighter the acceleration increased. The first mass we used was grams g.
When the object had a mass of 90 g or. As with acceleration, speed also increased with a decrease in mass. This shows us that when one value is kept constant on the right side of the equation, force increases or decreases, depending on the increase or decrease of the value that changes.
Although not physically tested the computer calculated this information the relationship between the percent of power and the actual power used was linear. Another calculation not physically tested was the potential energy of the object.
Observe the measurement for the acceleration of the trolley. Enter from the keyboard '1' 1 newton in the force column of the table. Release the trolley from the same starting point as before.
Repeat this several times. Enter '2' 2 newtons in the force column of the table. Analysis Depending upon the software, the results may be displayed on a bar chart as the experiment proceeds.
Note the relative increase in values of acceleration as the slotted mass is increased. The relationship between acceleration and applied force is investigated more precisely by plotting an XY graph of these two quantities.
- Relationships between acceleration, force and mass
Use a curve-matching tool to identify the algebraic form of the relationship. This is usually of the form 'acceleration is proportional to the applied force'. This relationship is indicative of Newton's second law of motion.
The great advantage of this version is that the software presents acceleration values instantly. This avoids preoccupation with the calculation process, and greatly assists thinking about the relationship between acceleration and force.
Each repetition with the same force gives a similar acceleration. We also show how to determine acceleration from average speeds calculated for successive time intervals of the motion measured by using several electronic counters connected to a single-crystal oscillator circuit.
Within experimental errors, the experiments clearly show the proportionality between acceleration and force for a fixed mass and between acceleration and inverse of mass for a fixed force.
Investigating Newton's second law of motion
Newton's second law, measurement of time interval, measurement of acceleration, average speed. Introduction To introduce Newton's second law or concepts such as force, inertial and gravitational mass and weight, it is a common practice to use the approach offered by PSSC Physics that, according to Arons , is quite reasonable for introductory levels.
In the PSSC context, Newton's second law of motion is investigated in the laboratory, with carts, times, and a rubber loop stretched a constant amount as the unit of force . The choice of stretched elastics to accelerate a cart on a level table is quite suitable as the starting point because it takes into account the intuitive notion of force related to a sensation of muscular effort but, due to the difficulty of keeping the rubber loop stretched a constant amount as the cart accelerates, the quantitative results are not always convincing.
Indeed, only the more attentive pupils obtain satisfactory results . For this reason, when we follow the sequence outlined in PSSC, we complement the laboratory activity with an experimental demonstration that allows confirmation of the validity of Newton's second law in a quick and convincing way.
Experimental set-up The experimental set-up consists of a glider on an air track connected by a string passing over a small pulley to a hanging load of mass m and weight mg.
We consider the glider and the load as a single object, subject to the accelerating force mg. To show that the acceleration of the system is proportional to the acceleration force when the total mass is kept constant, we begin with a hanging load of mass m and add four identical metallic discs of mass m to the glider of mass M Fig. To double the accelerating force, one disc is transferred from the glider to the hanging load.