Which of the following is a property of static friction? A) Occurs when the surf

Question

Which of the following is a property of static friction? A) Occurs when the surfaces are sliding B) Varies to a maximum C) Is perpendicular to the surfaces D) All of these A person is riding on a Ferris wheel. The wheel makes one revolution which returns the person to the starting point. The net work done by the gravitational force is A) zero B) positive C) negative D) need to know speed. Two satellites are in orbit around the Earth. The orbit one satellite a distance r and the other is a distance 2r from the center of the Earth. The gravitational force is A) zero on both satellites. B) four times as big on the satellite at 2r C) same on both satellites D) four times as big on the satellite at r 4. Mechanical energy is conserved when A) net force is zero B) e work done by the net force is zero. C) the work done by a force is positive. D) the work done by non-conservative forces is zero. How is the work shown on a force vs. position graph? A) area B) slope C) on t

Explanation / Answer

1B static friction varies up to limiting friction

2A the net work done in a round trip is zero

4Dwork done by non conservative force is zero

3D gravitation force is inversely proportional to square of the distance between th bodies

5 A area represents the work done

6C net work done should be positive

7A equilibrium under single force is not possible

8A tension will be greater

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