The British scientist ________, who lived from 1642 to 1727, published a set of three rules in 1687 that explained how forces and motion are related.
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Gravity
________: an attractive force between any two objects that depends on the masses of the objects and the distance between them.
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Moon
On the ________, the gravitational force on the astro- naut is less than it is on Earth.
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Projectile
________: Anything thats thrown or shot through the air.
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free fall
When all forces except gravity acting on an a falling object can be ignored, the object is said to be in ________.
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Inertia
________: the tendency of an object to resist a change in its motion.
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Third Law of Motion
________: describes action- reaction pairs this way: When one object exerts a force on a second object, the second one exerts a force on the first that is equal in strength and opposite in direction.
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Gravity
________ is one of the four basic forces.
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Inertia
the tendency of an object to resist a change in its motion
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Second Law of Motion
states that the acceleration of an object is in the same direction as the net force on the object, and that the acceleration can be calculated from the following equation
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Gravity
an attractive force between any two objects that depends on the masses of the objects and the distance between them
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The Law of Universal Gravitation
gravitational force = (constant) x (mass 1) x (mass 2) / (distance) (squared)
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Gravitational Force Equation
gravitational force(N)
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Weight
The gravitational force exerted on an object
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Weight Equation
weight (N) = mass (kg) X gravitational acceleration (m/s2)
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Projectile
Anything thats thrown or shot through the air
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Centripetal Acceleration
Acceleration toward the center of a curved or circular path
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Centripetal Force
The net force exerted toward the center of a curved path
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Momentum
the product of its mass and velocity
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Formula
momentum (kg m/s) = mass (kg) X velocity (m/s)
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Law of Conservation of Momentum
if a group of objects exerts forces only on each other, their total momentum doesnt change
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First Law of Motion
states that if the net force acting on an object is zero, the object remains at rest, or if the object is moving, it continues moving in a straight line with constant speed.
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Second Law of Motion
states that the acceleration of an object is in the same direction as the net force on the object, and that the acceleration can be calculated from the following equation:
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Weight
The gravitational force exerted on an object
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Centripetal Acceleration
Acceleration toward the center of a curved or circular path
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Centripetal Force
The net force exerted toward the center of a curved path
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Third Law of Motion
describes action-reaction pairs this way: When one object exerts a force on a second object, the second one exerts a force on the first that is equal in strength and opposite in direction
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Momentum
the product of its mass and velocity.
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Law of Conservation of Momentum
if a group of objects exerts forces only on each other, their total momentum doesn’t change.
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Flashcard (40)