Physics Test Questions & Answers

Physics Test Questions & Answers A ball is pushed with a Net Force of 10N, but another force is pushing against the ball with 10N. Describe the state of the ball. - CORRECT ANSWER- The ball is not accelerating positively or negatively, it is rolling at a constant speed in a straight line. Action and reaction are always equal in strength and opposite in direction, so why don't they cancel one another and make net forces greater than zero impossible? - CORRECT ANSWERNewton's 3rd Law says that action and reaction forces require two objects. If "A" pushes on "B," "B" pushes on "A." If two equal forces act on the same object in opposite directions, those forces will cancel each other out. So if a book is at rest on a table, the earth pulls down on the book and the table pushes up on the book. Since the book is at rest, the net force acting on the book must be zero which means the forces must have cancelled each other out. Complete the sentence: When the forces acting on an object at rest are balanced... - CORRECT ANSWER- The object stays in motion. Complete the sentence: When the forces acting on an object in motion are balanced... - CORRECT ANSWER- The object stays in motion. Distinguish between the concepts of directly proportional and inversely proprtional - CORRECT ANSWER- If one thing is directly proportional to something else, as one increases by a certain factor (such as doubling), the other will increase by the same factor (which means it will double). If one this is inversely proportional to something else, as one