Which of the following happens when unbalanced forces act on an object? the object remains stationary. the object moves with the same velocity. the object moves in the direction of the stronger force. the object's speed and direction of motion remain unchanged

Abicycle slows down when the rider applies the brakes. what type of energy transformation is involved in this example? a. kinetic energy into heat energy b. heat energy into potential energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?

Acar of mass 800kg is moving at a speed of 2.2m/s.