<span>volume of a sphere = 4/3pi*r^3, so if you double the diameter (same as doubling the radius) it's 2^3 times bigger,</span>
The accelerations will be the same because the acceleration of each rock is caused only by gravity, which accelerates objects the same amount no matter what the velocity is.
Answer: Graphing data is used to display data because it is easier to see trends in the data when it is displayed visually compared to when it is displayed numerically in a table.
Can't really plot a graph here for question 1.
2a) The car speeds up from A to B. The car travels at a constant speed from B to C. The car slows down to a stop from C to D.
b) From the graph, at 10 seconds, the car is moving at 20 m/s.
