What is another name for kepler’s second law? a. law of periods b. law of ellipses c. law of harmonies d. law of equal areas in equal times

If anyone who can me with this hw? i would really appreciate it

Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1) where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. record these velocities, to two decimal places, in table e.

In which of these cases are the two wave points considered to be in phase with each other?