A book is on top of a table.Earths gravity exerts a constant force of 15 N on the book.why does the booj not move as a result of this force ?
An object is traveling in a straight line in space. No firces are,affecting it. What will happen to the objects motion?
Two race cars with the same mads stated moving on a race track at the same time. One car reached the finish line of the track in 15 sec, and the other reached the finish line in 20 sec. Why did the cars take different amounts of time to reach the finish line?
1) The force due to the acceleration of gravity is straight down on the book (we call this a "normal force"), so the book doesn't move.
2) continue in that state to infinity.
3) same what? apparently because one had a larger velocity(or speed in this case) than the other - may need more info on this one
Careful. The Normal force is exerted by the table, not gravity.
1. The book does not move as a result of the force of gravity because there is an equal and opposite force being exerted on the book by the table. This force is known as the normal force. The normal force acts perpendicular to the table and balances out the force of gravity, resulting in a net force of zero. According to Newton's first law of motion, an object at rest or in motion with a constant velocity will remain that way unless acted upon by an external force.
2. If an object is traveling in a straight line in space with no forces affecting it, it will continue moving in a straight line with a constant velocity. This is described by Newton's first law of motion, also known as the law of inertia. In the absence of any external force, there is no reason for the object's motion to change.
3. The two race cars took different amounts of time to reach the finish line because their speeds were different. Speed is a measure of how quickly an object covers a given distance. The car that reached the finish line in 15 seconds was moving at a faster speed compared to the car that took 20 seconds. This could be due to various factors, such as differences in engine power, weight, aerodynamics, or the skill of the drivers. The time it takes for an object to cover a distance is inversely proportional to its speed.