A rocket carrying a satellite is accelerating straight up from the earth's surface. At 1.35 s after liftoff, the rocket clears the top of its launch platform. After an additional 4.45s it is 1.00km above the ground. Calculate the magnitude of the average velocity of the rocket for a) the 4.45-s part of its flight; b) the first 5.80s of its flight.
The Attempt at a Solution
A)I did a and kept on getting 225. (1063-63)/(5.80-1.35)=225
B) I don't get B