Investigating the Effect of Mass and Speed of a Moving Object on Its Stopping Time

Investigate the influence of the mass and speed of the moving object on the stop time We examine the mass and speed of the moving object and the influence of the change of energy required for braking on the stopping distance. We can not accurately measure speed and energy, so change the definition of investigation. The problem / work I study is the quality of the moving object - how the trolley affects its stopping distance. [Image] [Image] Stopping distance m In order to stop the running vehicle, braking force is necessary.

In Newton (classical) mechanics, it represents a macroscopic object that moves at a speed a fraction of the speed of light, and the kinetic energy of the moving mass is multiplied by half the velocity (v) to its mass (m) It can be calculated as multiplied. ): E = 1/2 mv 2. Please note that energy is scalar. That is, energy does not depend on direction and is always positive. Doubling the mass doubles the energy, but doubling the speed will increase the energy by four times. Perhaps the most important feature of kinetic energy is the ability to work. Work is defined as the force acting on an object in the direction of movement. Work and energy are closely related and can be exchanged. Kinetic energy is usually expressed as E = 1/2 mv 2, but work (W) is generally considered to be force (F) multiplied by distance (d): W = Fd. If you want to change the kinetic energy of a large object, you must study it.

An object has kinetic energy when it is moving. The dynamic energy of an object depends on the mass and speed of the object. On the other hand, the potential energy is the energy storage amount when the object is at rest. Describes the amount of work that an object can execute at startup. This is the energy that we normally control. When the object begins to move, its potential energy is converted into kinetic energy. Let's return to gravity as an example. The stationary bowling at the top of Burj Khalifa has a lot of potential energy (storage). When falling, the ball pulled by the gravitational field will accelerate towards the ground. When the ball accelerates, the potential energy is converted into kinetic energy (energy from motion). Ultimately, all the energy of the ball is converted from potential to kinetic energy and then passed to all energies hit. When the ball is on the ground it has a very low potential energy

Tell students that we will work when moving high quality items. Quality has characteristics of inertia. Roll heavy things (bowling); Students block it, but use the force to stop it. When rolling the object again, the student will change the direction of the ball this time and the student must move the ball again with the power. Students will explain the power required to move, stop, and change the direction of scrolling objects. Gaining ideas We studied the two powers today. What are these? Gravity and friction When we overcome forces such as gravity and friction, we are working. When we work, we are usually fighting forces within a certain distance. Let me give some examples of what we did in the experiment. What did Berta do through the room? Yes, she touched it.