Device for acceleration test of slope

Abstract

The invention discloses a device for an acceleration test of a slope. The device comprises an inclined sliding plate, a horizontal sliding plate, a ticker-tape timer, paper tape and a trolley. The lower end of the inclined sliding plate is in smooth connection with the horizontal sliding plate, the ticker-tape timer is installed on the upper portion of the inclined sliding plate, and the paper tape penetrates through the ticker-tape timer and is connected with the rear end of the trolley; the trolley comprises a trolley body and a braking mechanism; a rear wheel shaft is installed at the rearportion of the trolley body, and the middle of the rear wheel shaft is sleeved with a first absorption part; the braking mechanism comprises a power source, a first electromagnet, a mercury switch, atension spring and a tension spring base; the power source, the first electromagnet and the mercury switch are sequentially connected in series through a wire, the first electromagnet is arranged on the front side of the first absorption part, an arc-shaped groove is formed in the rear of the first electromagnet, the tension spring base is fixed to the front side of the first electromagnet, and the two ends of the tension spring are connected with the tension spring base and the first electromagnetic respectively. When moving to a planar sliding plate, the trolley of the device gets braked automatically through a brake, braking is reliable and safe, and therefore it is effectively avoided that the trolley is damaged under collision.

Description

technical field [0001] The invention relates to the technical field of physics teaching appliances, in particular to an experimental device for acceleration on an inclined plane. Background technique [0002] The purpose of the slope acceleration test is to verify the acceleration of the car on the slope. When the car is placed on the slope, under the action of gravity, the car on the slope rolls down the slope. The acceleration of gravity is vertical and parallel to the slope. The gravitational acceleration component is gsinθ, which is the net acceleration of the car after ignoring the friction. To measure this acceleration, the car is started from rest. According to the law of uniform linear motion, the displacement differences in adjacent equal time intervals are equal, △ S=aT 2 , the actual acceleration due to gravitational acceleration g can be calculated. [0003] At present, when doing slope acceleration experiments, when the trolley slides downward on the slope, th...

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Problems solved by technology

[0003] At present, when doing slope acceleration experiments, when the trolley slides downward on the slope, the trolley will gain a speed. In order to stop the trolley, a baffle is generally installed at the lower end of the slope, and the trolley can be stopped by the blocking effect of the baffle. In this process, the car will collide with the baffle, and the car will often be damaged in the experiment, which increases the cost of experimental equipment

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