Asolid 0.6950 kg ball rolls without slipping down a track toward a vertical loop of radius =0.8950 m . what minimum translational speed must the ball have when it is a height h=1.377 m above the bottom of the loop in order to complete the loop without falling off the track? assume that the radius of the ball itself is much smaller than the loop radius . use =9.810 m/s2 for the acceleration due to gravity.

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?

Wo small variable-thrust jets are actuated to keep the spacecraft angular velocity about the z-axis constant at ? 0 = 1.16 rad/s as the two telescoping booms are extended from r1 = 1.18 m to r2 = 4.69 m at a constant rate over a period of 124 seconds. the small 19-kg experiment modules at the ends of the booms may be treated as particles, and the mass of the rigid booms is negligible. determine the necessary thrust t for each jet as a function of time where t = 0 is the time when the telescoping action is begun. after you have the general expression for t, answer the questions. show work.

Madison lives near the ocean. she’s formed a hypothesis that increased concentrations of salt in the air speeds the corrosion of certain metals. if madison plans to test this hypothesis, she will have to deal with the following variables in her experiment: dependent variable: independent variable: one possible confounding variable: