Lab on the Relationships of Time, Distance, and Acceleration at Constant Velocity

The initial speed is the speed and direction the object moves at the beginning of the time interval and the last speed is the speed and direction the object moves at the end of time. Average speed is the average speed and direction of the object. An example of this is that after 10 seconds the car is stopped with the westward speed at 0 m / s and the westward speed at 20 m / s.

Acceleration is the speed at which the object's speed changes. It's just how the object's speed changes and the time it takes to change. An example of acceleration is that the speed must be increased until the speed limit is reached that the car no longer accelerates when the car starts to move.

3. Distance - The time chart shows that the travel distance is proportional to the travel time. The slope of the graph is a straight line, and since the speed of the object is constant, it indicates the speed of the object. As the chart is straight, you can see that there is uniform acceleration. This can be compared with a car on a highway that does not accelerate while running at a constant speed. The speed - time chart shows an indirect relationship between speed and time. Since the slope of the graph is almost zero, it means that there is no acceleration.

 Through this experiment, I examined the relationship of time, distance and acceleration at constant speed.

 The laboratory began with Joe putting his legs in front of the truck and Bob sparked out. When Joe moves his feet, the truck moves with the flow of the tape. When the tape has completely passed through the spark, bring the tape to the test stand and start measuring. Look for the second possible reading point and treat it as zero. Because sparks spark in 2 seconds, draw a circle every other five circles and measure the distance between zero and the circle point. In order to find the displacement, we measured the points around each circle point and subtracted two numbers.

Acceleration represents the percentage of time the speed changes. The relationship between acceleration and speed is similar to the relationship between speed and displacement. Acceleration is a vector. When the speed is constant, a = 0. If 'a' is a nonzero constant, the object is said to accelerate equally. The average acceleration of an object is defined as follows. Set the device to measure acceleration. First set the height to 15 cm and the length of the slope to 227 cm. At this height, there is a possibility that the car slides down due to gravity, so there is no need to add power to the car to accelerate the car. In this way, you can keep the gravity constant. Then I will use the ticker and ticker to measure the acceleration. I put the ticker on an 850 gram trolley and drop it. Since 0.2 seconds is displayed for every 10 ticker belt marks, cut the ticker belt with 10 marked strips.

By definition, acceleration is the rate of change of time. The speed is a scalar, but the speed is a vector. Speed ​​has size and direction. In the animation below, the velocity vector is shown as an arrow. The direction changes, but the range does not change. Speed ​​when vector bar is not written v is the speed magnitude. By definition, speed is ds / dt. (Refer to Introduction of Calculus.) Since radius r is a constant, v is r × dθ / dt. v is the change rate of the linear position, and dθ / dt is the change rate of the angular position. This is called angular velocity and we use symbol ω. The speed is rω and the direction is tangent.