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30 Cards in this Set

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 Air Resistance fluid friction acting on an object moving through the air Centripetal Force a force that continuously changes the direction of an object to make it move in a circle Electromagnetic Force a force associated with charged particles Fluid Friction a friction force that opposes the motion of an object through a fluid Force a push or pull that acts on an object Friction a force that opposes the motion of objects that touch as they move past each other The four types of friction are rolling, static, fluid, and sliding Gravitational Force an attractive force that acts between any two objects Gravity the attraction between any two objects because of their masses Inertia the tendency of an object to resist a change in its motion Law of Conservation of Momentum law stating that the total momentum of a system does not change if no net force acts on the system Mass The amount of matter in an object, as measured by its inertia Momentum the product of an object's mass and its velocity Net Force the overall force acting on an object after all the forces are combined Newton the SI unit for force, equal to the force that causes a 1 kilogram mass to accelerate at a rate of one meter per second squared (1N=1 kg X m/s^2 Projectile Motion the curved path of an object in free fall after it is given an initial forward velocity Rolling Friction a friction force that acts on rolling objects, caused by the change in shape at the point of rolling contact the friction force between a rolling object and the surface on which it is moving Ex. Bicycle, Dog, Wheelchair, Anything with wheels Sliding Friction The friction resisting an object as you slide it over a surface Ex. Dragging a box across the floor (more sliding friction makes it harder to move) Static Friction a friction force that acts on objects that are not moving the friction you need to make an object move from a stationary position Ex, dragging a box that is sitting Strong Nuclear Force the powerful attractive force that binds protons and neutrons together in the nucleus Terminal Velocity the constant velocity of a falling object when the force of air resistance equals the force of gravity Weak Nuclear Force a powerful attractive force that acts over a short range and affects all particles. Weight The force of gravity acting on an object How does force affect an object? A force can set an object at rest into motion, or it can accelerate a moving object by changing the object's speed or direction Why does a projectile create a curved path? The combination of initial horizontal velocity and downward vertical force of gravity causes the object to follow a curved path. Newton's First Law of Motion According to Newton's first law of motion, the state of motion of an object does not change as long as the net force acting on the object is zero. Newton's Second Law of Motion According to Newton's second law of motion, the acceleration of an object is equal to the net force acting on it divided by the object's mass. A= Net Force/ Mass Newton's Third Law of Motion According to Newton's third law of motion, whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first object. Calculate Force F= A x M A= F/M M= F/A Calculate Weight Weight= Mass x Acceleration due to gravity W=mg Calculate Momentum Momentum= Mass x Velocity