A 1.4-m pendulum is initially at its leftmost position of -9 degrees .Determine the period for one back-and-forth swing. Use g= 9.8 m/sec2 .Write a model for the angular displacement of the pendulum after t seconds.

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Based on the solution of Question 7, please answer 8 and show work.

Solve for each variable.     x ≈ 4.56, y ≈ 2.04     x ≈ 14.62, y ≈ 5.32     x ≈ 4.70, y ≈ 1.71     x ≈ 1.71, y ≈ 4.70

Click the play button and note the values of the angular speed w, and the linear speed v. (i) How does decreasing the radius affect the linear speed? (ii) How does increasing the radius affect the angular speed? Use the interactive figure to find your answer. Use the left and right arrow keys to move along a slider as needed. Click here to launch the interactive figure. (1) Choose the correct answer below. O A. When the radius decreases the linear speed increases. B. When the radius decreases the linear speed stays the same. C. When the radius decreases the linear speed decreases. (ii) Choose the correct answer below. O A. When the radius increases the angular speed increases. O B. When the radius increases the angular speed stays the same. O C. When the radius increases the angular speed decreases.

step b-Calculate D(4). Round your answer to two decimal places.) D(4) =

Kelly, an experienced bungee jumper, leaps from a tall bridge and falls toward the river below. The bridge is 190 feet above the water and Kelly's bungee cord is 125 feet long unstretched. When will Kelly's cord begin to stretch? Round your answer to two decimal places. Gravity Formula