<P> The first law states that if the net force ( the vector sum of all forces acting on an object ) is zero , then the velocity of the object is constant . Velocity is a vector quantity which expresses both the object 's speed and the direction of its motion ; therefore , the statement that the object 's velocity is constant is a statement that both its speed and the direction of its motion are constant . </P>
<P> The first law states that if the net force ( the vector sum of all forces acting on an object ) is zero , then the velocity of the object is constant . Velocity is a vector quantity which expresses both the object 's speed and the direction of its motion ; therefore , the statement that the object 's velocity is constant is a statement that both its speed and the direction of its motion are constant . </P>
what does the first law of motion state
what does the first law of motion state
if the net force ( the vector sum of all forces acting on an object ) is zero , then the velocity of the object is constant
if the net force ( the vector sum of all forces acting on an object ) is zero , then the velocity of the object is constant