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Ms. Menanno Forces
Question | Answer |
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newton | A unit of measure that equals the force required to accelerate 1 kilogram of mass at 1 meter per second per second |
net force | The overall force on an object when all the individual forces acting on it are added together |
unbalanced forces | Forces that produce a nonzero net force, which changes an object’s motion. Cause an object to start moving, stop moving or change direction |
balanced forces | Equal forces acting on an object in opposite directions. Do not change an object’s motion |
friction | The force that one surface exerts on another when the two surfaces rub against each other |
static friction | Friction that acts on objects that are not moving. Most difficult to overcome |
sliding friction | Friction that occurs when one solid surface slides over another |
rolling friction | Friction that occurs when an object rolls over a surface |
gravity | The force that pulls objects toward each other |
mass | The amount of matter in an object |
weight | The force of gravity on an object at the surface of a planet |
free fall | The motion of a falling object when the only force acting on it is gravity |
air resistance | The fluid friction experienced by objects falling through the air |
terminal velocity | The greatest velocity a falling object can achieve |
projectile | An object that is thrown or launched |
inertia | The tendency of an object to resist any change in its motion |
momentum | A measure of the amount of motion an object has. Momentum = mass x velocity |
law of conservation of momentum | The rule that in the absence of outside forces the total momentum of objects that interact does not change |
force | A push or pull exerted on an object |