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Mechanics

219 MCQ questions with answers and explanations · page 9 of 9

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Q201. At which of the following places will the value of 'g' (gravity) be the highest?

  1. AOn top of Mount Everest
  2. Bon top of Qutub Minar
  3. CAt the equator
  4. DAt camp in Antarctica
Show answer & explanation

Answer: D) At camp in Antarctica

Q202. On whose principle does hydraulic brake work?

  1. APascal's law
  2. BBernoulli's theorem
  3. CThomson's law
  4. DNewton's laws
Show answer & explanation

Answer: A) Pascal's law

Q203. Which of the following does not have a unit of Newton meter?

  1. AForce
  2. Bkinetic energy
  3. CWork
  4. Denergy
Show answer & explanation

Answer: A) Force

Q204. A runner runs for some distance before taking a long jump because-

  1. ARunning makes jumping easier
  2. BThis warms his body.
  3. CThe inertia of his body while jumping helps him cover a greater distance.
  4. DHe doesn't slip when he jumps
Show answer & explanation

Answer: C) The inertia of his body while jumping helps him cover a greater distance.

Q205. Two stones of different masses are dropped simultaneously from the top of a building.

  1. Athe smaller stone reaches the ground first
  2. BThe bigger stone reaches the ground first.
  3. CBoth stones reach the ground at the same time.
  4. DDepends on the composition of the stone
Show answer & explanation

Answer: C) Both stones reach the ground at the same time.

Q206. Angular momentum is equal to

  1. Amoment of inertia x angular velocity
  2. Bmass x angular velocity
  3. Clinear velocity x angular velocity
  4. Dmass x linear velocity
Show answer & explanation

Answer: A) moment of inertia x angular velocity

Q207. Bernoulli's principle states the conservation of which of the following?

  1. AMass
  2. Benergy
  3. CLinear momentum
  4. Dpressure
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Answer: B) energy

Q208. Why does an iron needle float on the surface of water?

  1. Adue to buoyancy of water
  2. Bdue to surface tension
  3. Cdue to viscosity
  4. Ddue to gravitational force
Show answer & explanation

Answer: B) due to surface tension

Q209. The absorption of ink by blotting paper involves-

  1. Aink viscosity
  2. Bcapillary reaction phenomenon
  3. Cdiffusion of ink through blotting
  4. DSiphon action
Show answer & explanation

Answer: B) capillary reaction phenomenon

Q210. What force is required to keep an object sliding at a constant speed on a surface?

  1. Astatic friction
  2. Brolling friction
  3. Ccontact friction
  4. Dsliding friction
Show answer & explanation

Answer: D) sliding friction

Q211. Who among the following had stated before Newton that all objects are attracted towards the Earth?

  1. AAryabhata
  2. BVarahamihira
  3. CBuddhagupta
  4. DBrahmagupta
Show answer & explanation

Answer: D) Brahmagupta

Q212. If a clock oscillating with a pendulum is taken from the Earth to the Moon, then the clock will be-

  1. ALazy
  2. BQuick
  3. Cwill give the same time as Earth
  4. Dwill stop working
Show answer & explanation

Answer: A) Lazy

Q213. Why is it easier to burst a gas-filled balloon with a needle than with a nail?

  1. AThe nail exerts more pressure on the balloon than the needle
  2. BThe gas is more reactive with the needle
  3. CThe nail is longer than the needle
  4. DThe needle exerts more pressure on the balloon than the nail
Show answer & explanation

Answer: D) The needle exerts more pressure on the balloon than the nail

Q214. When is the apparent weight of a person in a lift less than his actual weight?

  1. AWhen the elevator is going down rapidly
  2. BWhen the lift is coming down at the same speed
  3. CWhen the lift is moving up at a constant speed
  4. Dwhen the elevator is going up fast
Show answer & explanation

Answer: A) When the elevator is going down rapidly

Q215. At what angle should a cricket ball be hit so that it travels the maximum distance?

  1. Aan angle of 60° with the horizontal
  2. Ban angle of 45° to the horizontal
  3. Can angle of 30° with the horizontal
  4. Dan angle of 15° with the horizontal
Show answer & explanation

Answer: B) an angle of 45° to the horizontal

Q216. What is the name of the force by which the Earth pulls all objects towards itself?

  1. Apush
  2. Bresistance
  3. Cair pressure
  4. Dgravity
Show answer & explanation

Answer: D) gravity

Q217. If the distance between two bodies is doubled, then the gravitational force between them-

  1. Awill decrease fourfold
  2. Bwill double
  3. Cwill decrease twice
  4. Dwill remain the same
Show answer & explanation

Answer: A) will decrease fourfold

Q218. The highest viscosity is-

  1. Aof water
  2. Bof air
  3. Cof blood
  4. Dof honey (e) None of the above More than one of the above
Show answer & explanation

Answer: D) of honey (e) None of the above More than one of the above

Q219. Which of the following statements is correct for a simple harmonic oscillator?

  1. AThe acting force is directly proportional to the displacement from the mean position and is in the same direction
  2. BThe acting force is directly proportional to the displacement from the mean position and is in the opposite direction.
  3. CThe acceleration of the pendulum is constant
  4. DThe velocity of the oscillator is not periodic
Show answer & explanation

Answer: B) The acting force is directly proportional to the displacement from the mean position and is in the opposite direction.

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