A bike and rider, 115-kg combined mass, are traveling at 3.3 m/s. A force of 105 N is applied by the brakes. What braking distance is needed to stop the bike?

Aball is thrown upward in the air, and its height above the ground after t seconds is h ( t ) = 57 t − 16 t 2 feet. find the time t when the ball will be traveling upward at 14.25 feet per second.

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

Acamcorder has a power rating of 20 watts. if the output voltage from its battery is 9 volts, what current does it use?