A spacecraft has a momentum of 20,000 kg-m/s, and a mass of 250 kg. What is the magnitude of its velocity? A. 80 m/s
B. 800 m/s
C. 400 m/s
D. 40 m/s SUBMIT

Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)

What happens when you slowly pulled the carboard?