Physics Circular Motion And Gravity Test: Question Preview (ID: 22064)


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A fly riding on the blade of a fan spinning at a constant speed is not accelerating
a) True b) False c) d)
The acceleration of an object in uniform circular motion always points toward the center of the circle.
a) True b) False c) d)
Centrifugal force is a center-seeking acceleration
a) True b) False c) d)
When an object moves in a circle at a constant speed, the net force toward the center of the circle is the centripetal force.
a) True b) False c) d)
The outside edge of a spinning compact disc is moving at a higher velocity than an inside track on the disc
a) True b) False c) d)
Ellipses have only one focus
a) True b) False c) d)
Gravity is a contact force.
a) True b) False c) d)
When an object is moving with uniform circular motion, the object's tangential speed
a) is circular b) is perpendicular to the plane of motion c) is constant d) is directed toward the center of motion
The centripetal force on an object in circular motion is
a) in the same direction as the tangential speed b) in the direction opposite the tangential speed c) in the same direction as the centripetal acceleration d) in the direction opposite the centripetal acceleration
A ball is whirled on a string, then the string breaks. What causes the ball to move off in a straight line?
a) centripetal acceleration b) centripetal force c) centrifugal force d) inertia
When calculating the gravitational force between two extended bodies, you should measure the distance
a) from the closest points on each body b) from the most distant points on each body c) from the center of each body d) from the center of one body to the closest point on the other body
Newton's law of universal gravitation
a) can be derived from Kepler's law of planetary motion b) can be used to derive Kepler's third law of planetary motion c) can be used to disprove Kepler's law of planetary motion d) does not apply to Kepler's laws of planetary motion
The gravitational force between two masses is 36 N. What is the gravitational force if the distance between them is tripled?
a) 4.0 N b) 9.0 N c) 18 N d) 27 N
When a car makes a sharp left turn, what causes the passengers to move toward the right side of the car?
a) centripetal acceleration b) centripetal force c) centrifugal force d) inertia
Two small masses that are 10.0 cm apart attract each other with a force of 10.0 N. When they are 5.0 cm apart, these masses will attract each other with what force?
a) 5.0 N b) 2.5 N c) 20.0 N d) 40.0 N
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