6. Luke Autbeloe, a human cannonball artist, is shot off the edge of a 100.0 m cliff with an initial upward
velocity of +40.0 m/s. Luke accelerates with a constant acceleration of -10.0 m/s2 (an approximate value
of the acceleration of gravity).
Sketch a velocity-time graph for the first 10 seconds of Luke's motion and determine the time required
for Luke Autbeloe to drop back to the original height of the cliff. Indicate this time on the graph.