A pendulum is made by tying a 550 g ball to a 49-cm-long string. The pendulum is pulled 25\" to one side, then released. 7 PartA What is the ball's speed at the lowest point of its trajectory? Express your answer with the appropriate units. ' View Available Hint(s) m a a o 7 v= Value Units Part3 To what angle does the pendulum swing on the other side? Express your answer in degrees. View Available Him(s) Iwo 6: _ _ _ Part A In a hydroelectric dam, water falls 26 m and then spIns a turbine to generate electricity. v Part3 Suppose the dam is 80% efficient at convening the water's potential energy to electrical energy. How many kilograms of water must pass through the turbines each second to generate 49 MW of electricity? This is a typical value for a small hydroelectric dam. Express your answer in kilograms per second. D View Available Hint(s) .mo m= 264913 658 m X Incorrect; Try Again; 5 attempts remaining Provide Feedback Next > Part A As a 1.5x104 kg jet plane lands on an aircraft carrier, its tail hook snags a cable to slow it down. The cable is attached to a spring with spring constant 5.8x104 N/m . If the spring stretches 33 m to stop the plane, what was the plane's landing speed? Express your answer with the appropriate units. HA ? V= Value Units Submit Request Answer Provide Feedback_ _ _ _ V Part A Asled starts from rest at the top of the lnctionless, hemispherical, snow-covered hill shown in (gure 1). Find an expression for the sled's speed when it is at angle . Express your answer in terms of some, all, or none of the variables R. (15, and the free-tall acceleration g. } View Available Hint(s) s o ? v1= l2gR(1 Cosqb) PreviousAnswers X Incorrect; Try Agaln; 4 attempts remaining v Part3 Use Newton's laws to find the maximum speed the sled can have at angle q without leaving the surface. Express your answer in terms of some, all, or none of the variables R, q}, and the free-tall acceleration g. > View Available Hint(s) s o vm= (gr(1 Cos) m PreviousAnswers X Incorrect; Try Again; 5 attempts remainlng Figure 1 of 1 R b Part0 Provide Feedback 7 Part A A horizontal spring with spring constant 110 N/m is compressed 16 cm and used to launch a 2.5 kg box across a frictionless, horizontal surface. After the box travels some distance, the surface becomes rough. The coefficient Of kinetic friction Of the box on the surface is Use work and energy to find how far the hex slides across the rough surface before stopping. 0.15. Express your answer with the appropriate units. EpAW)? l= Value Units Fliequest