saiaspire said:that would not be possible.. everything in this universe has mass..
however light or any electro magnetic radiation for that matter, in vacuum, moves with the same speed(3x10^8 m/s) forever..
Newton's First Law of Motion, also known as the Law of Inertia, states that an object at rest will stay at rest and an object in motion will stay in motion at a constant velocity in a straight line unless acted upon by an external force.
Newton's First Law directly relates to straight line speed as it explains that an object in motion will continue to move at a constant speed in a straight line unless acted upon by a force. This means that if no external forces act upon an object, it will continue to move at the same speed and direction.
Straight line speed is significant in relation to Newton's First Law because it demonstrates the concept of inertia. An object will continue to move in a straight line at a constant speed unless a force acts upon it, showing that objects have a tendency to resist changes in motion.
According to Newton's First Law, mass does not directly affect straight line speed. However, a larger mass may require a greater force to change its speed or direction due to its increased inertia. This means that an object with a larger mass may appear to have a slower straight line speed than an object with a smaller mass when acted upon by the same force.
No, according to Newton's First Law, an object will only have a constant speed in a straight line if no external forces are acting upon it. If an object is constantly being acted upon by external forces, its speed and direction will change accordingly. This is known as unbalanced forces, where the net force acting on an object is not equal to zero.