- Chapter 6: Homework 1 Question 7 of 10 0 / 15 Question 6 of 10 - /10 E : View Policies Show Attempt History You bring a boat toward the dock by pulling on a rope with a force of 130 newtons through a distance of 7 meters. Current Attempt in Progress A mass of 0.124 kg hangs from a vertical spring in the lab room. You pull down on the mass and throw it Part 1 vertically downward. The speed of the mass just after leaving your hand is 4.00 m/s. (a) How much work do you do? (Include the appropriate sign.) Part 1 i joules Save for Later * Your answer is incorrect. Attempts: 0 of 4 used Submit Answer (a) While the mass moves downward a distance of 0.04 m, how much work was done on the mass by the Earth? Include the appropriate sign. Part 2 Work done by Earth = i o Save for Later (b) Then you slow the boat down by pushing against it with a force of 50 newtons, opposite to the boat's movement of 3 meters. How much work do you do? (Include the appropriate sign.) Attempts: 2 of 4 used Submit Answer i joules Save for Later Part 2 Attempts: 0 of 4 used Submit Answer (b) At the instant in part (a) when the mass has moved downward a distance of 0.04 m, the speed of the mass has decreased to 2.36 m/s. How much work was done on the mass by the spring? Include the Part 3 appropriate sign. Work done by spring = i (c) What is the total amount of work that you do? eTextbook and Media i joules Save for Later SUPPORT eTextbook and Media SUPPORT Attempts: 0 of 4 used Submit Answer Save for Later ---------- -_ _ _ _ _Affemntc. Temnts' 0 of 4 used Submit