A rocket sled on a straight, horizontal track accelerates uniformly from rest, achieving a velocity of 300 m/s in a time of 4.0 s. The velocity then remains constant for 2.0 s. Finally, the sled decelerates uniformly for 4.0 s at a rate of 50 m/sē.

Draw a velocity vs. time graph of the motion of the rocket sled.

 

Calculate the displacement of the sled in the following time intervals.

  1. t = 0 to 4.0 s:
  2. t = 4.0 to 6.0 s:
  3. t = 6.0 to 10.0 s:

Draw a position vs. time graph of the sled's motion. Scale the position axis.

Solution