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31 Cards in this Set

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