Of roller coaster car rapidly picks up speed as it rose down a slope as it starts down the slope, its speed is 4m/s . but 3 seconds later at the bar got bottom of the slope, is speed is 22m/s. what is its average acceleration?

Bob camina 200 m sur, luego trota 400 m suroeste, luego camina 200 m en una dirección 30? norte del este. a. dibuje una gráfica de los movimientos de bob. use una regla y transportador. b. use método gráfico y analíitico para hallar el desplazamiento total que bob recorrió. (magnitud y dirección) c. compare los resultados obtenidos por el método gráfico y analítico. (por ciento de diferencia).

Which of the following statements accurately describes the sign of the work done on the box by the force of the push? a. positive b. negative c. zero

Acircular ring of charge with radius b has total charge q uniformly distributed around it. what is the magnitude of the electric field at the center of the ring? 0 keq/b2 keq2/b2 keq2/b none of these answers