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rotational kinematics

Terms in this set (20)

when an object is moving with uniform circular motion, the object's tangential speed
is perpendicular to plane of motion
when an object is moving with uniform circular motion, the centripetal acceleration of the object
is directed toward the center of motion
what term describes a change in the speed of an object in circular motion
tangential acceleration
what is the term for the net force directed toward the center of an object's circular path
centripetal force
which of the following can be a centripetal force
friction, gravity, and tension
the centripetal force on an object in circular motion is
in the plane of the object's motion and perpendicular to the tangential speed
the centripetal force on an object in circular motion is
in the same direction as the centripetal acceleration
what kind of force provides the centripetal force on a bicycle
friction
when a car makes a sharp left turn, what causes the passengers to move toward the right side of the car
inertia
a ball is whirled on a string, the string breaks; what causes the ball to move in a straight line
inertia
why does an astronaut weigh less on the moon than earth
the gravitational field strength is less on the moon's surface than on earth's
an object's tendency to resist acceleration is measured by the object's
inertial mass
which of the following confirms that gravitational mass and inertial mass are equivalent
free-fall acceleration is the same at all points where the gravitational field strength is the same
Newton's law of universal gravitation equation
Fg= G(m1m2/r^2)
when calculating the gravitational force between two extended bodies, you should measure the distance
from the center of each body
according to Kepler's law of planetary motion
if ∆t1=∆t2, then A1=A2
Newton's law of universal gravitation
is equivalent to Kepler's first law of planetary motion
how would the speed of earth's orbit around the sun change if earth's distance from the sun increased by 4x
decrease by a factor of 2
how would the speed of earth's orbit around the sun change if the earth's mass was increased by 4x
increase by a factor of 2
when an astronaut in space experiences apparent weightlessness
the net gravitational force on astronaut is not balanced by normal force
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