Engineers designing a braking system for an electric car want to test the current that the system generates. They drive a car which is fitted with this braking system at different speeds, brake,then measure the voltage generated.Identify the independent and dependent variables in this experiment.Formulate a research question.Predict a suitable hypothesis for the experiment supported by scientific reasoning.
Question
Engineers designing a braking system for an electric car want to test the current that the system generates. They drive a car which is fitted with this braking system at different speeds, brake,then measure the voltage generated.Identify the independent and dependent variables in this experiment.Formulate a research question.Predict a suitable hypothesis for the experiment supported by scientific reasoning.
Solution
In this experiment, the independent variable is the speed at which the car is driven. This is because the engineers are actively manipulating this variable to see how it affects the outcome.
The dependent variable is the voltage generated by the braking system. This is the outcome that the engineers are measuring, and it is expected to change based on the speed at which the car is driven.
A possible research question could be: "How does the speed at which an electric car is driven affect the voltage generated by its braking system?"
A suitable hypothesis for this experiment could be: "Increasing the speed at which the electric car is driven will result in a higher voltage generated by the braking system." This hypothesis is based on the scientific reasoning that a higher speed would result in more kinetic energy, which could be converted into more electrical energy (voltage) when the car brakes.
Similar Questions
Engineers designing a braking system for an electric car want to test the current that the system generates. They drive a car which is fitted with this braking system at different speeds, brake,then measure the voltage generated.
The engineers who conducted this experiemnt formulated a hypothesis that the voltage generated by the braking system would be directly proportional to the speed at which the car is travelling.Determine whether their hypothesis was correct or not.Support your answer with the data.B
Using what you know about friction and other forces, explain the effect of the variable you tested on braking distance.
The braking system of a car relies on which principle of physics?(1 Point)Bernoulli's principleArchimedes' principlePascal's principleHooke's law
A new design for the braking system on a certain type ofcar has been proposed. For the current system, the trueaverage braking distance at 40 mph under specified con-ditions is known to be 120 ft. It is proposed that the newdesign be implemented only if sample data stronglyindicates a reduction in true average braking distance forthe new design.a. Define the parameter of interest and state the relevanthypotheses.b. Suppose braking distance for the new system isnormally distributed with s 5 10. Let X denote thesample average braking distance for a randomsample of 36 observations. Which values of x aremore contradictory to H0 than 117.2, what is theP-value in this case, and what conclusion is appro-priate if a 5 .10?
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.