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30 Cards in this Set
- Front
- Back
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Air Resistance
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fluid friction acting on an object moving through the air
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Centripetal Force
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a force that continuously changes the direction of an object to make it move in a circle
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Electromagnetic Force
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a force associated with charged particles
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Fluid Friction
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a friction force that opposes the motion of an object through a fluid
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Force
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a push or pull that acts on an object
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Friction
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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 |
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Gravitational Force
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an attractive force that acts between any two objects
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Gravity
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the attraction between any two objects because of their masses
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Inertia
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the tendency of an object to resist a change in its motion
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Law of Conservation of Momentum
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law stating that the total momentum of a system does not change if no net force acts on the system
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Mass
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The amount of matter in an object, as measured by its inertia
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Momentum
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the product of an object's mass and its velocity
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Net Force
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the overall force acting on an object after all the forces are combined
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Newton
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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
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Projectile Motion
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the curved path of an object in free fall after it is given an initial forward velocity
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Rolling Friction
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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 |
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Sliding Friction
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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) |
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Static Friction
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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 |
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Strong Nuclear Force
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the powerful attractive force that binds protons and neutrons together in the nucleus
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Terminal Velocity
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the constant velocity of a falling object when the force of air resistance equals the force of gravity
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Weak Nuclear Force
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a powerful attractive force that acts over a short range and affects all particles.
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Weight
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The force of gravity acting on an object
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How does force affect an object?
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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
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Why does a projectile create a curved path?
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The combination of initial horizontal velocity and downward vertical force of gravity causes the object to follow a curved path.
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Newton's First Law of Motion
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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.
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Newton's Second Law of Motion
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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 |
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Newton's Third Law of Motion
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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.
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Calculate Force
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F= A x M
A= F/M M= F/A |
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Calculate Weight
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Weight= Mass x Acceleration due to gravity
W=mg |
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Calculate Momentum
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Momentum= Mass x Velocity
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