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9th Grade > Physics

TURNING EFFECT OF FORCES MCQs

Total Questions : 62 | Page 4 of 7 pages
Question 31. Two unlike parallel forces of the same magnitude but not along the same line forms a
  1.    couple
  2.    inertia
  3.    gravity
  4.    friction
 Discuss Question
Answer: Option A. -> couple
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 32. Moment arm is the
  1.    parallel distance
  2.    perpendicular distance
  3.    normal distance
  4.    resultant force
 Discuss Question
Answer: Option B. -> perpendicular distance
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 33. A block of weight 12 N is hanging through a string. Its tension in the string will be
  1.    10 N
  2.    11 N
  3.    12 N
  4.    0 N
 Discuss Question
Answer: Option C. -> 12 N
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 34. The resultant of forces 10 N along x-axis, 6 N along y-axis and 4 N along negative x-axis is
  1.    8.5 N making angle 45 ° with x-axis
  2.    8.5 N making angle 90 ° with x-axis
  3.    8.3 N making angle 30 ° with x-axis
  4.    8 N making angle 45 ° with x-axis
 Discuss Question
Answer: Option A. -> 8.5 N making angle 45 ° with x-axis
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 35. If a block returns to its original position after slight tilt then it is in state of
  1.    unstable equilibrium
  2.    stable equilibrium
  3.    neutral equilibrium
  4.    weightlessness
 Discuss Question
Answer: Option B. -> stable equilibrium
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 36. Splitting up of a force into two mutually perpendicular components is called the
  1.    determination of that force
  2.    subtraction of the forces
  3.    resolution of that force
  4.    line of action of that force
 Discuss Question
Answer: Option C. -> resolution of that force
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 37. A boy tightens the nut of a car using a 16 cm long spanner by applying a force of 180 N. The torque will be
  1.    2880 N m
  2.    28.8 N m
  3.    30 N m
  4.    11.25 N m
 Discuss Question
Answer: Option B. -> 28.8 N m
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 38. A paratrooper coming down with terminal velocity is
  1.    accelerating
  2.    decelerating
  3.    not in equilibrium
  4.    in equilibrium
 Discuss Question
Answer: Option D. -> in equilibrium
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 39. The body is in equilibrium if sum of all the
  1.    forces acting on it is zero only
  2.    torque acting on it is zero only
  3.    momentum acting on it zero
  4.    forces and acting on it is zero
 Discuss Question
Answer: Option D. -> forces and acting on it is zero
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 40. A body is in equilibrium if it moves with
  1.    uniform velocity
  2.    constant velocity
  3.    uniform acceleration
  4.    constant acceleration
 Discuss Question
Answer: Option A. -> uniform velocity
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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