A student runs times around a running poth at a local parkEach lapis 3 km. The student completes the first lap in 20 minutes. The student sits on a bench and rests for 5 minutes before completing the second lap in 25 minutes. Which graph best represents the student's motion

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.