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31 Cards in this Set
- Front
- Back
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The force that causes downward acceleration is
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GRAVITY
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The force of gravity depends on the __ of an object.
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MASS
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The force pulling objects toward the center of Earth is called..
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GRAVITY
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What will change on another planet, mass or weight?
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WEIGHT (due to change in gravity)
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How can you change an object's mass?
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ADD or REMOVE PIECES
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The force created by the effect of gravity on objects is called
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WEIGHT
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The value for the acceleration due to gravity is
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9.8 m/s^2
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The equation for weight is
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w = mg
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What is the unit for weight?
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N or kg.m/s^2
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Gravity is a force of attraction between any two objects that have mass. This is Newton's law of..
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UNIVERSAL GRAVITATIONAL ATTRACTION
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What is the gravitational constant?
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G (a value that is the same everywhere in the Universe)
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What variables are included in the calculation of Universal Gravitation?
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MASS (of each object) and the RADIUS between the objects
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A force that resists forward motion is
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FRICTION
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A force that works in the opposite direction to motion is
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FRICTION
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What are the four types of friction?
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AIR, SLIDING, ROLLING, VISCOUS
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Friction cause by air moving around objects is called
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AIR FRICTION (or AIR RESISTANCE)
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Friction due to motion through water or other fluids is called
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VISCOUS FRICTION
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Friction caused by two surfaces rubbing together is
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SLIDING FRICTION
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Friction caused by one object rolling over another is called
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ROLLING FRICTION
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A fish swimming in a lake is an example of __ friction.
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VISCOUS
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Rollerblades moving across the sidewalk is an example of __ friction.
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ROLLING
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Tires skidding on the road is an example of __ friction.
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SLIDING
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A plane flying is an example of __ friction.
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AIR
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What reduces air friction?
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AERODYNAMIC SHAPES
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What reduces viscous friction?
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SHAPE, THINNER/LESS VISCOUS FLUIDS
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What changes sliding friction to viscous friction?
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OIL
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What reduces sliding friction?
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SMOOTHER SURFACES
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How does friction affect acceleration?
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CAUSES DECELERATION
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Which of Newton's laws states: "The force of attraction between objects is related to their masses and inversely related to the distance between them."
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LAW OF UNIVERSAL GRAVITATION
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In the equation v=d/t, v is __ related to d.
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DIRECTLY
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In the equation v=d/t, v is __ related to t.
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INVERSELY
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