Acceleration 1/21/18

http://s3.amazonaws.com/answer-board-image/6f39d490-ea4e-44d9-b1e1-93f06ce49314.jpeg

Acceleration is the increase in the rate of speed of an object's motion. In physics, acceleration is the rate of change of velocity of an object per unit time. Acceleration measured two changes, the change in position of an object and the change in velocity of an object. An example of acceleration is when an object speeds up. To find the acceleration of an object's motion you need to follow a certain formula. The formula for acceleration is velocity divided time or more specifically the difference between the velocity final and velocity initial, divided by time. If the acceleration you have found is a negative acceleration as the numbers turn out to be negative, then this is called a deceleration. You will usually have a deceleration when the velocity final is smaller than the velocity initial so when you subtract and divide, the numbers are negative. An example of deceleration in an object is when an object slows down. Once you have found the acceleration with this formula, the units for acceleration is m/s^2 which is the measurement unit per second squared.

S&EP - SP3: Planning and carrying out investigations

I identified questions to be investigated when I asked what the velocity of the hot wheels car would be at 1 seconds, 2 seconds, 3 seconds, and 4 seconds. I asked these questions when the height of the hot wheels ramp was at one book, two books, and three books. I identified my manipulated variables which were the height of the hot wheels ramp. We changed this variable by adding more books under the ramp to make the ramp steeper. The controlled variables of this experiment were the same hot wheels car, the same ramp, the same timer, and the same units of time and measurement. I designed and performed experiments to test my hypotheses. I thought that the hot wheels would have a larger acceleration when the hot wheels ramp was steeper, and proved this by testing and finding the acceleration of the hot wheels velocity when going down ramps with different heights. These heights include one book, two books, and three books. I decided to collect the measurement of the hot wheels car at 1 second, 2 seconds, 3 seconds, and 4 seconds, this is the position of the car at different times. I chose to collect this data so I could calculate the velocity of the hot wheels car and eventually the acceleration.

Speed and Velocity - 1/14

https://byjus.com/physics/wp-content/uploads/2015/12/velocity.jpg

Speed is the rate at which an object covers distance. Velocity is the rate of the distance traveled by an object per unit time in a particular direction. The difference between speed and velocity is that speed has doesn't require direction while velocity is speed with a given direction. This is why speed is a scalar quantity and velocity is a vector quantity. An example of speed is "the car traveled 25 m per second". In addition, an example of velocity is "the car traveled 25 m per second east". Since both speed and velocity require the rate at which an object covers distance per unit time, they share the same formula. The formula to calculate for speed and velocity is speed or velocity = d/t. D/t stands for distance divided by time. So in order to find the speed or velocity of an object's movement, you need information on the total distance traveled by the object and the amount of time it took the object to travel that distance. The unit for speed is usually m/s or meters per second and the unit for velocity is usually m/s direction. Speed and velocity can be graphed on a position vs. time graph.

S&EP - SP1: Asking questions and defining problems

I formulate testable questions when I read over the questions on the "Speed and Velocity" document that was assigned. I needed to answer these questions about speed and velocity in order to complete this document. To answer these questions, I needed to read the correlating article and research the information. I established what is already known about speed and velocity when I answered the questions and typed them down on the document. I determine what questions have yet to be answered when I looked at the remaining questions I still haven't answered or when I looked at the questions that I couldn't find the information for. I defined constraints and specifications for a solution as I realized that I couldn't calculate and solve for speed or velocity without knowing information about the distance and time of the object's movement. I needed to know the total distance the object traveled and the amount of time it took for the object to travel this distance. The reason I needed this information is because the formula for speed or velocity is distance/time.