calculate the acceleration of a bus who speeda changes from 6 m/s to 12 m / s over a period of 3 seconds

Assuming weightless pulleys and 100% efficiency, what is the minimum input force required to lift a 120 n weight using a single fixed pulley?

The graph represents the distance a car travels over time while on the highway. which statement about the car's trip is accurate? a) the car does not move over time. b) the car travels at a constant velocity. c) the car's velocity increases constantly over time. d) the car's velocity decreases constantly over time.

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.