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Isaac Newton’s first law of Motion states: an object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force. Newton’s first law is also referred to as the law of inertia, or the resistance to change when in a state of motion. An object that is at rest has a velocity of 0 m/s2, acceleration of 0 m/s2, and a tendency to stay at rest (unless acted upon by another force). An object that is in motion, does not have a velocity of 0 m/s2, or an acceleration of 0 m/s2, and the object will remain in motion (until acted on by another force). The object will also have the same direction and velocity). When in a state of motion, all objects resist changes.
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The Three girls
are curently at rest,
according to Newton they will remain at rest until acted upon by another object. |
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The first law of motion has many parts pertaining to forces and changes in velocity. If there is more than one force acting upon an object, they add up to equal the sum of all the forces. This group of forces added to make one force is called the net force (or total force). The net force is always external to the object; it can not solely come from the object. The net force may change the velocity of an object. If the net force of an object is equalled to zero, the object will not have a change in velocity. If the object has a net force above 0, this shows the velocity is changing. The velocity will be changed only when this one force is being applied. Only one force can be applied at a time. If a net force is not present, due to a result from unbalanced forces acting on the object, it’s velocity will remain constant. In order for this to occur, all external forces must cancel each other out. In the case of an additional external force, the velocity will alter because of the force. Newton’s first law clearly explains how and why objects in motion, or at rest, remain constant. |
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The girl is stand still (she is at rest), therefore she will remain at rest until acted on by another object. |
