Jolb said:On a bicycle, if you stop pedaling, you don't immediately stop. You keep moving with the same velocity you had just before you stopped pedaling, and then you gradually slow down. Slowing down is due to forces acting on your bicycle--wind resistance, friction in the wheels, etc. But if there were no force acting on your bicycle to slow you down, you would continue to coast at a constant velocity once you stop pedaling. But since there are forces acting to slow you down such as wind resistance, maintaining a constant speed requires you to pedal just enough to cancel the resistance force--when one force cancels the other, you are left with zero net force and thus remain at a constant velocity.
abi.ayan said:So the bicycle doesn't move due the force given by me.But the force I gave only cancel out the air resistant and frictonal force.I am I right?
According to Newton's first law of motion, an object will remain at rest or continue to move in a straight line at a constant velocity unless acted upon by an external force. Since an object with constant velocity is not changing its speed or direction, it is not experiencing a net force, causing it to remain in motion without any additional force acting on it.
No, an object cannot have a constant velocity while a force is acting on it. The presence of a force will cause the object to accelerate, either by increasing or decreasing its speed, or changing its direction. Therefore, an object with a constant velocity must be free of any forces acting on it.
Forces cause changes in an object's velocity, according to Newton's second law of motion. When a net force is applied to an object, it will accelerate in the direction of the force. This means that the object will experience a change in its velocity, either by increasing or decreasing its speed or changing its direction.
In a vacuum, there is an absence of air resistance or other external forces that may cause an object to slow down or change direction. Therefore, an object moving at a constant velocity in a vacuum will continue to do so because there is no force acting on it to change its state of motion.
No, an object with constant velocity cannot have a non-zero acceleration. By definition, an object with constant velocity is not experiencing a change in its speed or direction, which means its acceleration is zero. If an object is accelerating, its velocity is changing, and therefore, it does not have a constant velocity.