Alight, rigid rod is 63.3 cm long. its top end is pivoted on a frictionless horizontal axle. the rod hangs straight down at rest with a small, massive ball attached to its bottom end. you strike the ball, suddenly giving it a horizontal velocity so that it swings around in a full circle. what minimum speed at the bottom is required to make the ball go over the top of the circle?

The duration of a photographic flash is related to an rc time constantly

Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.