Also, if something is standing still, it will, if left to itself, continue to stand still.
Something else must push on an object to get it moving.
Galileo is traditionally credited with being the first scientist to formalize this concept.
Isaac Newton (1642-1727) summarized Galileo’s idea as Newton’s First Law: Every object continues in a state of rest, or of motion in a straight line at a constant speed, unless it is compelled to change that state by unbalanced forces exerted upon it.
A. Describe how the picture below demonstrates the law of inertia.
B. A girl attaches a rock to a string, which she then swings counterclockwise in a horizontal circle. The string breaks at point P on the sketch, which shows a bird's-eye view (i.e., as seen from above). What path will the rock follow?
C. A 4.0 kg object is moving across a frictionless surface with a constant velocity of 2 m/s. Which one of the following horizontal forces is necessary to maintain this state of motion? A. 0 N B. 0.5 N C. 2.0 N D. depends on the speed
But what exactly is meant by the phrase unbalanced force?