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Home  arrow Chapter 5  arrow Practice Questions

Practice Questions



This activity contains 25 questions.

Question 1.
A stone, of mass m, is attached to a strong string and whirled in a vertical circle of radius r. At the exact top of the path the tension in the string is 3 times the stone's weight. The stone's speed at this point is given by


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Question 2.
A stone, of mass m, is attached to a strong string and whirled in a vertical circle of radius r. At the exact bottom of the path the tension in the string is 3 times the stone's weight. The stone's speed at this point is given by


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Question 3.
A stone is whirled in a vertical circle on a cord. Halfway up


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Question 4.
A roller coaster car is on a track that forms a circular loop in the vertical plane. If the car is to just maintain contact with the track at the top of the loop, what is the minimum value for its centripetal acceleration at this point?


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Question 5.
A girl attaches a rock to a string, which she then swings counterclockwise in a horizontal circle. The string breaks at point P on the sketch, which shows a bird's-eye view (i.e., as seen from above). What path will the rock follow?


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Question 6.
The following statements refer to man-made, artificial satellites in orbit around earth. Which is an accurate statement?


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Question 7.
Two objects are travelling in circular orbits. Object A is travelling at twice the velocity of object B in a circle with a diameter of twice that of B. The centripetal acceleration


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Question 8.
A cannon ball is fired horizontally off a high cliff over a great distance. If air resistance can be ignored the path it follows is


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Question 9.
The variation of g over the surface of the earth does not depend upon


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Question 10.
There are four forces in nature. Which one allows you to close a door by pushing on it?


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Question 11.
A ball of mass m is moving in a circle with uniform speed on a horizontal surface with friction at the end of a radial metal rod. The net force is


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Question 12.
Two bodies of equal mass are separated by a distance R. If you double the distance between them the new gravitational force will be


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Question 13.
Two bodies of equal mass are separated by a distance R. If you double each mass then the new force will be


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Question 14.
Two bodies of equal mass are separated by a distance R. If you double one mass then the new force will be


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Question 15.
Two bodies of equal mass are separated by a distance R. If you double each mass and double the distance between them, the new force will be


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Question 16.
The Earth moves faster in the winter when its closest to the Sun. This is an example of


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Question 17.
Which of the following does not belong with the others?


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Question 18.
Kepler's Third Law can be used to relate the motions of the


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Question 19.
If the mass of the Earth was quadrupled and nothing else was changed


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Question 20.
A planet with twice the mass and twice its radius has a value of g


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Question 21.
Four equal masses are arranged in a perfect square. The direction of the force on the one in the lower left hand corner


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Question 22.
Four equal masses are arranged in a perfect square. The magnitude of the force on the one in the lower left hand corner due to the one diagonally across from it


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Question 23.
The speed of a satellite in orbit does not depend on


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Question 24.
The period of planet X is .62 Earth years and that of planet Y is 1.9 years.


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Question 25.
Which of the following does not belong with the others?


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