The Toyota Prius has a drag coeffi cient of 0.25, a frontal area of 23.4 ft2, and an empty weight of 3042 lbf. Its rolling resistance coeffi cient is Crr 5 0.03, that is, the rolling resistance is 3 percent of the normal force on the tires. If rolling freely down a slope of 88 at an altitude of 500 m, calculate its maximum velocity, in mi/h.

The motor m applies a time-varying force of f (200 t) n, where t is in seconds. box b with mass 200 kg starts from rest, and the coefficients of kinetic and static friction are 0.2 and us 0.3 the acceleration due to gravity is g 9.8 m/s2 b 300 a) find the time ' when the box starts to move. b) calculate the speed of the crate at 3 s c) calculate the power delivered by the motor at t 3 s

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Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples