Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Laws of Motion question

2013 · Q148
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Physics
  4. /Laws of Motion
  5. /2013 · Q148

Laws of Motion question

2013 · Q148

NEETPhysicsLaws of MotionMCQ+4 / −1
A car is moving in a circular horizontal track of radius 10 m with a constant speed of 10 m/s. A bob is suspended from the roof of the car by a light wire of length 1.0 m. The angle made by the wire with the vertical is
  1. A
    π3{\pi \over 3}3π​
  2. B
    π6{\pi \over 6}6π​
  3. C
    π4{\pi \over 4}4π​
  4. D
    0o
View written solutionFree

Correct answer: C

Let θ\theta θ is the angle made by the wire with the vertical.

∴\therefore∴ tan⁡θ=v2rg\tan \theta = {{{v^2}} \over {rg}}tanθ=rgv2​

Here, v = 10 m/s, r = 10 m, g = 10 m/s2

∴\therefore∴ tan⁡θ=(10  m/s)210 m(10  m/s2)=1\tan \theta = {{{{\left( {10\,\,m/s} \right)}^2}} \over {10\,m\left( {10\,\,m/{s^2}} \right)}} = 1tanθ=10m(10m/s2)(10m/s)2​=1

θ=tan⁡−1(1)=π4\theta = {\tan ^{ - 1}}\left( 1 \right) = {\pi \over 4}θ=tan−1(1)=4π​

PreviousNext

More from Laws of Motion

  • The upper half of an inclined plane of inclination θ is perfectly smooth while lower half is rough. A block starting from rest at the top of the plane will again come to rest at the bottom, if the coefficient of friction between…2013 · MCQ
  • Three blocks with masses m, 2m and 3m are connected by strings, as shown in the figure. After an upward force F is applied on block m, the masses move upwards at constant speed v. What is the net force on the block of mass 2m ? (g is the… Includes diagram2013 · MCQ
  • A stone is dropped from a height h. It hits the ground with a certain momentum P. If the same stone is dropped from a height 100% more than the previous height, the momentum when it hits the ground will change by2012 · MCQ
  • A conveyor belt is moving at a constant speed of 2 ms−1. A box is gently dropped on it. The coefficient of friction between them is μ = 0.5. The distance that the box will move relativce to belt before coming to rest on it, taking g…2011 · MCQ
  • A person of mass 60 kg is inside a lift of mass 940 kg and presses the button on control panel. The lift starts moving upwards with an acceleration 1.0 m/s2. If g = 10 ms−2, the tension in the supporting cable is2011 · MCQ
  • A body of mass M hits normally a rigid wall with velocity V and bounces back with the same velocity. The impulse experienced by the body is2011 · MCQ
  • A block of mass m is in contact with the cart C as shown in the figure. The coefficient of static friction between the block and the cart is μ. The acceleration α of the cart that will prevent the block from falling satisfies Includes diagram2010 · MCQ
  • The mass of a lift is 2000 kg. When the tension in the supporting cable is 28000 N, then its acceleration is :2009 · MCQ