1) For a right angle triangle if base is 4 cm and perpendicular is 3 cm then cosθ is equal to a. 0.9 b. 0.8 c. 0.3 d. 1
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2) The number of perpendicular components of a force are a. 1 b. 2 c. 3 d. 4
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3) When the resultant torque acting on a body is zero, then the body satisfies a. 2nd condition for equilibrium b. third condition for equilibrium c. no equilibrium state d. first condition for equilibrium
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4) Two children sitting on a see saw are not swinging, the net torque is a. greater than 1 b. less than 1 c. zero d. infinite
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5) If a body remains in its new position when disturbed from its previous position, then it is said to be in the state of a. stable equilibrium b. unstable equilibrium c. neutral equilibrium d. zero equilibrium
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6) To lower their center of mass, circus artists use a. short poles b. long poles c. heavy costumes d. light costumes
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7) Torque is turning effect of a. force b. moment of force c. line of action of force d. frictional force
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8) A couple is produced by a. one unlike parallel force b. two unlike parallel forces c. like parallel force d. two alike parallel force
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9) The sum of two or more forces is called a. resultant forces b. like parallel forces c. unlike forces d. positive forces
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10) If the sum of clockwise momentum is equal to sum of anti-clockwise momentum then body is in a. zero gravity b. balanced c. imbalanced d. non equilibrium
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11) The point of a system where an applied force causes the system to move without rotation is termed as a. friction b. center of gravity c. center of a mass d. intersection point
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12) If A and B are the end points of a spanner and force applied is F, then the torque of the couple is equal to a. F - AB b. F&frac; AB c. F × AB d. F + AB
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