Problem #1 [10 marks] An astronaut on a distant planet wants to determine the planet's acceleration due to gravity. She throws a rock straight up with a speed of 15.0 m/s and measures a time of 20.0 s before the rock returns to her hand. a) What is the magnitude of acceleration due to gravity on this planet? b) What is the velocity 13.5 s after the rock is thrown? y 1 08 = 150 Problem #2 [10 marks] B = 30 km B A + B = R Suppose a pilot flies 40.0 km in a direction 60 North of East and then flies 30.0 km in a direction 150 N A = 40 km North of East as shown. Find her total distance R R = ? from the starting point and the direction 0 of the A W - E straight-line path to the final position. 0 = ? S +1.25 GA = 60 x 1 +1.00 B +0.75 D Position x (km) C Problem #3 [10 marks] +0.50 An object is moving along a straight line. The graph shows its position from the starting point as a function of time. Plot a graph showing the +0.25 velocity of this object as a function of time. 0.20 0.40 0.60 0.80 1.00 Time : (h) Problem #4 [10 marks] A hockey puck is struck at ice level and flies off at an initial angle 0 above the horizontal. It continues moving through the air and just clears the top of the glass (2.80 m) at a horizontal distance of 12.0 m. The flight time to this point was 0.650 s. a) What is the horizontal component of the initial velocity? b) What is the vertical component of the initial velocity? c) What is the magnitude of the initial velocity? d) What is the angle 0? PHYSICS 1100 (Sec. $74) MID TERM EXAM #1 Sept 24, 2019 STAGE TWO Names: 2. 3. 4. Problem #5 [10 marks] A hockey puck is struck at ice level and flies off at an initial angle 0 above the horizontal. It continues moving through the air and just clears the top of the glass (2.80 m) at a horizontal distance of 12.0 m. The flight time to this point was 0.650 s. a) What is the horizontal component of the initial velocity? b) What is the vertical component of the initial velocity? c) What is the magnitude of the initial velocity? d) What is the angle 0