Which of these statements is always true? question 12 options: if an object is moving, a net force is acting on it. an object in equilibrium must not be in motion. a moving object in equilibrium continues at a constant velocity. a moving object in equilibrium can change its direction but not its speed.

As a pendulum bob swings back and forth several times, the maximum height it reaches becomes less and less. this is because more and more of the pendulum bob's energy is being transformed into a. heat energy b. kinetic energy c. potential energy d. kinetic energy and potential energy

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?

Give an example in which the electrical energy changes to light energy