Q1. A brick is thrown upward from the top of a building at an angle of 45° to the horizontal and with an initial speed of 10 m/s. If the brick is in flight for 2.8 s, how tall is the building?
Q2. A parachutist bails out and freely falls 66 m. Then the parachute opens, and thereafter she decelerates at 2.3 m/s2. She reaches the ground with a speed of 2.9 m/s. (a) how long is the parachutist in the air? (b) At what height does the fall begin?