A small child’s leg when she walks can be modeled as uniform circular motion. Assume that each hip moves in a circular arc equal to the length of the leg, with the weight-bearing foot at the center of the circle and the child’s entire mass concentrated near the hip. Calculate the maximum speed vmax at which she can walk if her weight is 20 kg and the length of her leg is 30 cm. A. 1.52 m/s
B. 1.71 m/s
C. 2.94 m/s
D. 3.00 m/s

A33.1 g copper object is launched from a 1.5 m 30° steel incline positioned on the floor by being pulled up a string attached to a 50.0 g mass suspended vertically over a pulley. the object is projected towards a glass table where it lands when it is at the point along its trajectory with the lowest speed. it comes to a halt when it clears the opposite edge of the table. it then falls and lands on 9 physics texts each 5 cm thick that are stacked on the floor on the opposite side of the table. assume that the table does not have a ledge and the rectangular object experiences 0.05 n of air resistance as it falls towards the books. how far and how long did the object travel and how fast does it hit the books. assume that at the moment the copper object leaves the incline, the massless string and ideal pulley break off

An electric clothes dryer has a resistance of 8 ohms. it draws 30 a of current. what is the voltage, in volts, of the wall outlet that it is plugged into?

What is the weight of a 8-kg substance in n, kn, kg·m/s2, kgf, lbm·ft/s2, and lbf?