The natural tendency of a moving object is to keep moving. And it doesn't really require energy to stop it; in fact, in theory, you can gain energy from it. What is required is a force.
No. That statement is false, mainly because it is not true. When you roll a ball across the floor, it comes to a stop because the inevitable friction where the ball contacts the floor robs it of kinetic energy. If the friction could be eliminated, the ball would not come to a stop. No force is required to keep a moving object moving.
The net force on the ball is directed towards the center of the circle, providing the centripetal force required to keep the ball moving in a circular path. This force is perpendicular to the velocity of the ball at any given moment.
The magnitude of the tension in the string at the bottom of the circle is equal to the sum of the gravitational force acting on the ball and the centripetal force required to keep the ball moving in a circular path.
When dribbling a basketball, the kinetic energy of the player's hand is transferred to the basketball when it is pushed downward. This kinetic energy then becomes gravitational potential energy as the ball reaches its highest point before falling back towards the ground. As the ball hits the ground, some of this kinetic energy is transferred back into the ball to keep it moving.
The ball would continue moving forward due to inertia, since it wants to keep moving at a constant speed. When the truck suddenly stops, the ball will keep moving forward until it hits the front side of the truck or another object in the truck bed.
The best, purest answer is: Because no force at all is required to keep a moving object moving.
Newton's laws of motion apply here: things only change velocity when a force is acting upon them. While objects that are moving have (potential) kinetic energy, no extra energy is required to keep them moving: energy would be required to change their motion.
In football, potential energy is stored in the ball when it is lifted off the ground before a pass or a kick. When the ball is in motion, it converts this potential energy into kinetic energy. Kinetic energy is what allows the ball to travel through the air and upon impact with a player or the ground.
Moving vehicles, such as cars and trains, utilize kinetic energy for their motion. Wind turbines convert the kinetic energy of moving air into electrical energy. Pendulum clocks rely on the kinetic energy of swinging pendulums to keep time. A bouncing ball demonstrates kinetic energy as it moves up and down. Roller coasters harness kinetic energy to propel riders along the track.
the same force and dahni is awesome
Once they are in orbit, no additional fuel is required to keep them moving.
In the vacuum of frictionless space, no force is needed to keep the ball moving. According to Newton's First Law of Motion, an object in motion will stay in motion unless acted upon by an external force. Therefore, once the ball is launched into frictionless space, it will continue moving indefinitely.