Question 15

Item 15 Review | Constants Part A A boat of mass 250 kg is coasting, with its engine in neutral, through the water at speed 1.00 m/s when it starts to rain with incredible intensity. The What is the speed of the boat after time 0.500 hr has passed? Assume that the water resistance rain is falling vertically, and it accumulates in the is negligible. boat at the rate of 100 kg/hr . Express your answer in meters per second. View Available Hint(s) 0.833 m/s Submit Previous Answers CorrectY FartEi Now assume that the boat is subject to a drag force Fa due to water resistance. Is the component of the total momentum of the system parallel to the direction of motion still cons shred? yes no Previous Answers 1/ Correct The boat is subject to an external force. the drag force due to water resistance: and therefore its momentum is not consented. Part C The drag is proportional to the square of the speed of the boat, in the form Fa = but where b = 0.5 N. $2/m. What is the acceleration of the boat just after the rain starts? Take the positive axis along the direction of motion. Express your answer in meters per second per second. > View Available Hint(s) VO AEd m/82 Submit Previous AnswersItem 19 Review | Constants Part A A block with mass 0.490 kg sits at rest on a light but not long vertical spring that has spring constant 75.0 N/m and one end on the floor. How much elastic potential energy is stored in the spring when the block is sitting at rest on it? Express your answer with the appropriate units. Uspring = 0.154 J Submit Previous Answers V CorrectPart B A second identical block is dropped onto the first from a height of 4.30 m above the first block and sticks to it. What is the maximum elastic potential energy stored in the spring during the motion of the blocks after the collision? Express your answer with the appropriate units. Umax = Value Units Submit Previous Answers Request AnswerPart C What is the maximum distance the first block moves down after the second block has landed on it? Express your answer with the appropriate units. HA C ? AT = Value Units Submit Previous Answers Request