Assuming that the drag on a modern automobile at high speeds is due primarily to form drag, estimate the power (horsepower) needed by an automobile with a 3.2- m ^{2} cross-sectional area to travel at:
(a) 80 km/h
(b) 90 km/h
(c) 100 km/h
Assuming that the drag on a modern automobile at high speeds is due primarily to form drag, estimate the power (horsepower) needed by an automobile with a 3.2- m ^{2} cross-sectional area to travel at:
(a) 80 km/h
(b) 90 km/h
(c) 100 km/h