Newton\'s Laws are all about a refined definition of force, including the idea t
ID: 1413591 • Letter: N
Question
Newton's Laws are all about a refined definition of force, including the idea that a force is always applied by one object on another object. In many, many situations that makes perfect sense, and you can identify the object responsible for the force. But in many other situations you have to do a little work to reconcile your intuition and Newton's Laws. Here are a couple of examples, to get you started. If you're standing on a train and the train starts moving, you feel "thrown backward" How can you account for that experience using Newton's Laws? We think of the controls inside a car as causing its motion - the gas pedal makes it speed up (or move), the brakes slow it down, the steering wheel makes it change directions. But, by Newton's Second Law, if there's a change in the car's velocity it's because there's a net (total) force on the car by some other object. If Newton's Laws are right, there must be another object outside the car pushing on it. Is there?Explanation / Answer
a)
Earth doesn't accelerate. It rotates with uniform velocity.When the train moves you'll be pushed backwards which is in the horizontal direction where as gravity acts in the vertical direction which has nothing to do with the earths motion.Gravity is the property of mass.
b) not able to answers this one.