Newton’s first law tells us that objects will
move in a straight line at a constant speed unless a net force is acting upon
them.
That rule would suggest that objects moving in a circle—whether they’re
tetherballs or planets—are under the constant influence of a changing force,
since their trajectory is not in a straight line. We will begin by looking at
the general features of circular motion and then move on to examine gravity, one
of the principal sources of circular motion.
Video Lessons and 10 Fully Explained Grand Tests
Large number of solved practice MCQ with explanations. Video Lessons and 10 Fully explained Grand/Full Tests.