Lakshya Education MCQs

Question: Kinetic friction may be defined as
Options:
A. Friction force acting when the body is just about to move
B. Friction force acting when the body is in motion
C. Angle between normal reaction and resultant of normal reaction and limiting friction
D. Ratio of limiting friction and normal reaction
Answer: Option B

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More Questions on This Topic :

Question 1. If two forces each equal to ‘t’ in magnitude act at right angles, their effect may be neutralized by a third force acting along their bisector in opposite direction whose magnitude will be
  1.     2 T
  2.     1/2 T
  3.     √2 T
  4.     3 T
Answer: Option C
Question 2. If a particle is projected inside a horizontal tunnel which is 554 cm high with a velocity of 60 m per sec, the angle of projection for maximum range, is
  1.     8°
  2.     9°
  3.     10°
  4.     11°
Answer: Option C
Question 3. If two forces each equal to ‘t’ in magnitude act at right angles, their effect may be neutralized by a third force acting along their bisector in opposite direction whose magnitude will be
  1.     2 T
  2.     1/2 T
  3.     √2 T
  4.     3 T
Answer: Option C
Question 4. A projectile has maximum range of 40 m on a horizontal plane. if angle of projection is a and the time of flight is 1 second, then sin a must be about (assume g = 10 m/sec²)
  1.     1/4
  2.     1/3
  3.     1/2
  4.     1/5
Answer: Option A
Question 5. If a particle is projected inside a horizontal tunnel which is 554 cm high with a velocity of 60 m per sec, the angle of projection for maximum range, is
  1.     8°
  2.     9°
  3.     10°
  4.     11°
Answer: Option C
Question 6. If two forces each equal to ‘t’ in magnitude act at right angles, their effect may be neutralized by a third force acting along their bisector in opposite direction whose magnitude will be
  1.     2 T
  2.     1/2 T
  3.     √2 T
  4.     3 T
Answer: Option C

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