Physics Help

Question 1 (2 points) With no wind, a hot air balloon rises vertically at 4.0 m/s. With a wind blowing, the same balloon rises at an angle of 10.0 with the vertical. What is the wind speed? ( a) 3.9 m/s ( b) 0.71 m/s O c) 0.69 m/s O d) 0.25 m/s ( e) 0.044 m/s Question 2 (2 points) Three stones are thrown from a cliff with the same speed but at different angles of elevation above the horizontal. Match the angle of elevation with the relative horizontal range for the stone. 1. minimum 150 2. moderate range 3. maximum range 30Question 3 (2 points) A boat always points directly at the opposite shore while crossing a river. The time it will take to cross will be O a) less if the current is stronger O b) greater if the current is stronger O c) the same regardless of the current O d) dependent on the strength of the current O e) impossible to predict without more information Question 4 (2 points) Two hikers set out from the same spot and arrive at the same destination but they take different routes. Which of the following quantities must be the same for both hikers? a) distance O b) average speed O c) average velocity O d) displacement O e) accelerationQuestion 5 {'1 point} The slope of a line drawn tangent to a curved positiontime graph represents 0 a] displacement O b] instantaneous velocityr O 5} average 1relocityr O 5\" acceleration 0 e] distance Question 15 {'1 point} The slope of a position-time graph represents 0 a} displacement O '3'} speed 0 C} velocity 0 '5\" acceleration O 3] distance