Forces & Newton's Laws
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Last updated 5:56 PM on 8/2/22
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29 Terms
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Weight
________ is the gravitational force exerted by the Earth onto an object.
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gravitational field
The ________ is strength greater at the poles than at the equator.
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Gravity
________ is a force that operates at a distance and pulls on objects without actually coming into contact with them.
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Inertia
________ is an attribute of matter that makes it resistant to changes in motion.
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Non
________- contact force: a force that occurs between objects without them touching.
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Object motion
________ is unaffected by internal forces.
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Mass
________ is the quantity of matter in an object.
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Earth
As the ________ is not a perfect sphere, gravity depends on the geographic location of an object.
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Acceleration
________ is equal to gravity in the downwards direction.
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net force
If the ________ acting on an object is zero, that object maintains its state of rest or constant velocity.
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Fnet
________ is the net force.
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Masses
________ will always be attracted to Earth when it interacts with the force field.
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Friction
________ can be both a good and bad thing.
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Kinetic friction acts
________ on any object that is in motion.
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Static Friction
________: acts between surfaces at rest but tends to move.
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Free Body Diagram
A(n) ________ (FBD) is a drawing of a single object that shows only the forces (as vectors) acting on that object.
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Kinetic Friction
________: acts between surfaces moving over each other.
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mud particles
The ________ accelerate from rest to some velocity when the leg is pushed downward.
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system diagram
A(n) ________ is a sketch of all of the objects involved in a situation.
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direction of motion
The force exerted on a moving objects by a surface opposite to the ________.
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Air resistance
________ is greater for larger cross- sectional areas than for smaller cross- sectional areas.
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pickup truck
When a(n) ________ is moving, you shouldn't stand in the back (bed) of the vehicle.
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Contact Force
a force that occurs in between two objects when they touch
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Non-contact force
a force that occurs between objects without them touching
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example
pushing a box
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Value
9.8 m/s^2 [down]
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Example
a box at rest
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Static Friction
acts between surfaces at rest but tends to move
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Kinetic Friction
acts between surfaces moving over each other
