AGLV10 MRU

Algetec

About this app

1. OBJECTIVE
This experiment deals with the movement of a body in a straight line. We will prove that a (mobile) object in uniform rectilinear motion (MRU) travels equal distances in equal time intervals. Thus, we will verify the validity of the equations that describe the MRU. As part of the activities, you will have to assemble and adjust the equipment and instruments necessary to carry out the experiment, according to the instructions in the appropriate script.


At the end of this experiment, you should be able to:

identify the characteristics of a uniform rectilinear movement (MRU);

collect experimental data to identify the MRU;

determine the average speed of a mobile in MRU;

build a graph of the variation in the position of the furniture as a function of time;

provide the hourly equation of the position and velocity of a mobile in MRU, based on your observations and measurements.

2. WHERE TO USE THESE CONCEPTS?
Although MRU is the simplest movement imaginable, it does not occur frequently in nature. This is due to the fact that when an object is forced to move, it is difficult to maintain a constant speed due to the forces acting on it.

If the driver of a car moving at 80 km/h on a perfectly flat road takes his foot off the accelerator, we will immediately notice a decrease in the car's speed, which will inevitably stop after some time. To maintain a constant speed, we need to compensate or balance the forces that tend to slow down the car, reducing its speed.

The car's accelerator has exactly this function. With an autopilot, which properly controlled the accelerator, we could keep the car at a constant speed.

A commercial airplane at cruising speed, maintained by the autopilot, is an example of an MRU similar to that of an automobile.

Another interesting case, which comes closest to a real MRU, is that of parachute jumping. The parachutist, when jumping with legs together and arms glued to the body, is in a free fall movement, with his speed increasing due to the action of gravity. Its final speed before the parachute opens varies between 200 and 240 km/h. With the parachute open, although it initially makes an accelerated movement, given the air resistance, it soon begins to move uniformly and, precisely for this reason, the speed does not increase too much, which provides a “smooth fall”.


3. THE EXPERIMENT
In this experiment you will use the inclined plane, where you will use a magnet to move the sphere inside the tube with water, a bubble level to level the test base and a stopwatch to measure the time in which the sphere travels the tube path in addition to positioning the base at the angle necessary to carry out the experiment.


4. SECURITY
The experiment was designed not to pose any physical risks. Even so, the experiment requires adequate PPE to carry out the activity in the laboratory.


5. SCENARIO
You will find on the bench, the inclined plane, the magnet, the timer and the spirit level.