Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Laws of Motion question

2005 · Shift 0 · Q174
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Physics
  4. /Laws of Motion
  5. /2005 · Shift 0 · Q174

Laws of Motion question

2005 · Shift 0 · Q174

JEE MainPhysicsLaws of MotionMCQ+4 / −1
A smooth block is released at rest on a 45∘{45^ \circ }45∘ incline and then slides a distance ′d′'d'′d′. The time taken to slide is ′n′'n'′n′ times as much to slide on rough incline than on a smooth incline. The coefficient of friction is
  1. A
    μk=1−1n2{\mu _k} = \sqrt {1 - {1 \over {{n^2}}}}μk​=1−n21​​
  2. B
    μk=1−1n2{\mu _k} = 1 - {1 \over {{n^2}}}μk​=1−n21​
  3. C
    μk=1−1n2{\mu _k} = \sqrt {1 - {1 \over {{n^2}}}}μk​=1−n21​​
  4. D
    μs=1−1n2{\mu _s} = 1 - {1 \over {{n^2}}}μs​=1−n21​
PreviousNext

More from Laws of Motion

  • A particle of mass 0.3 kg subjected to a force F=−kx with k=15N/m. What will be its initial acceleration if it is released from a point 20 cm away from the origin?2005 · MCQ
  • Consider a car moving on a straight road with a speed of 100m/s. The distance at which car can be stopped is [μk​=0.5]2005 · MCQ
  • Two masses m1​=5kg and m2​=4.8kg tied to a string are hanging over a light frictionless pulley. What is the acceleration of the masses when left free to move? (g=9.8m/s2) Includes diagram2004 · MCQ
  • A block rests on a rough inclined plane `making an angle of 30∘ with the horizontal. The coefficient of static friction between the block and the plane is 0.8. If the frictionless force on the block is 10N, the mass of the…2004 · MCQ
  • Three forces start acting simultaneously on a particle moving with velocity, v. These forces are represented in magnitude and direction by the three sides of a triangle ABC. The particle will now move with velocity Includes diagram2003 · MCQ
  • A horizontal force of 10N is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and the wall is 0.2. The weight of the block is Includes diagram2003 · MCQ
  • A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads 49N, when the lift is stationary. If the lift moves downward with an acceleration of 5m/s2, the reading of the spring…2003 · MCQ
  • A marble block of mass 2kg lying on ice when given a velocity of 6m/s is stopped by friction in 10s. Then the coefficient of friction is2003 · MCQ