Consult your doctor if: 1  Your headache symptoms occur more than 15 days a month or require frequent over-the-counter pain medicine. 2  You have a severe headache, and over-the-counter pain medicine doesn't help. 3  You miss school or work because of frequent headaches or the headaches interfere with your daily life. 4  Definition. Causes.
Newton's law of gravitation. (nt'nz) The principle that expresses the force of gravitational attraction between two bodies as a function of their mass and their distance.
Newton's Second Law of Motion states that Fnet = ma, that is, the net force acting on an object is equal to its mass times its acceleration. If you divide both sides by m(mass) you get a(acceleration) = Fnet/m, hence acceleration is inversely proportional to mass.omentum = mass * inertia So, mass and the force required for change in an object's momentum [or an acceleration] are directly proportional. More mass, more momentum so more force required to change its state of motion, less mass, less momentum and less force to effect a change. quntmphys238 Â· 7 years ago. Thumbs up.