By definition, the speed is given by the quotient between the distance traveled and the time it takes to travel that distance. We have then that the expression for speed is as follows v = d / t where d: distance t: time Substituting v = (90feet) / (5s) = 18feets / s answer the average rate of the airplane model, in feet per second was 18feets / s
hookes law gives the equation F=kx where F is the elastic force and k is the constant and x or small e is extension if we draw a graph you'll see that the graph increases by the same ratio every single time hence giving a straight line show that they are F and x are propotional to a certain limit
