Physics 30S Final Exam Review-2.pdf

Physics 40S RRSD Final Exam – June 2005 Page 2Part A – Multiple Choice [50 marks]1. A ball dropped from rest falls freely until it hits the ground with a speed of 20meters per second. The time during which the ball is in free fall isapproximatelya) 1 s c) 0.5 sc) 2 s d) 10 s2. An astronaut on the moon throws a 5.0 kg wrench vertically upwards with aninitial speed of 15 m/s. The acceleration due to gravity on the surface of themoon is one-sixth that on the surface of the earth. What is the maximum heightreached by the wrench?a) 25 m b) 46 mc) 69 m d) 75 m3. The graph below represents an object's motion for twenty seconds.Using the graph, the acceleration of the object at 6 seconds is:a) -102m/s b) 102m/s c) -52m/s d) 52m/s