A two-stage rocket lifts off from Earth with the acceleration shown in the graph below. Assume its initial height is zero, and it is initially at rest. Answer the following

questions. a) Draw a complete v – t graph. Label the axes with the appropriate variable and units. Provide an appropriate scale for each axis and clearly show the velocity at t = 0, t = 20 s, t =25 s, respectively. (3 points) b) What is the equation of velocity as a function of time, v =f (t), for the time interval of 0 < t < 20 s? Be sure to include appropriate units. (2 points) c) What is the equation of velocity as a function of time, v = ƒ (t), for the time interval of 20 s