Question

8. A boat is heading due north as it crosses a wide river with a speed of 10.0 km/h relative to the water. The river has a current such that the water moves with a uniform speed 5.00 km/h due east. Determine the magnitude and direction of the boat's velocity with respect to an observer on the riverbank (5 points) A plane maintains a speed of 630 km/h relative to the air it is flying through, as it makes a trip to a city 750 km away to the north. (6 points) 9. What time interval is required for the trip if the plane flies through a headwind blowing at 35.0 km/h toward the south? What time interval is required if there is a tailwind with the same speed? What time interval is required if there is a crosswind blowing at 35.0 km/h to the east relative to the ground? a. b. c. 10. A student stands at the edge of the cliff and throws a stone horizontally over the edge with a speed of 25.2 m/s. If the cliff is 63.8 m high then (8 points) a. How long will it take for the stone to reach the bottom b. At impact, what is its speed c. What will be the horizontal distance traveled by the stone? d. Calculate c. if the stone is thrown at an angle of 10.3° above the horizontal

Answer 1