A velocity-time graph is plotted showing the motion of a car. If the graph is a curved line, it means that (a) The car started at rest
(b) Acceleration was constant
(c) Velocity is increasing uniformly
(d) Velocity is changing non uniformly​

An object is 10 cm from the mirror, its height is 1 cm and the focal length is 5 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1 -1 +10 -10

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.

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