Physics Practice MCQ Page 6

Multiple Choice questions for Physics in the sets of 10 each on one page with questions and answers. All sets are useful in the preparation of subject tests for employment or admission.
Question: 249   The action and reaction forces referred in Newton's third law of motion
  1. must act upon the same body
  2. must act upon different bodies
  3. need not to be equal in magnitude but must have the same line of action
  4. must be equal in magnitude but need not have the same line of action
Question: 250   A force of 100 dynes acts on a body of 5 gms for 10 secs. Find the change in momentum.
  1. 10 C.G.. Units
  2. 100 C.G.. Units
  3. 1000 C.G.. Units
  4. 10000 C.G.. Units
Question: 253   We can clean a dirty carpet by beating. This is in accordance with
  1. Newton's first law
  2. Newton's second law
  3. Newton's third law
  4. none of the above
Question: 254   A force of 100 dynes acts on a body of 5 gms for 10 secs. What is the velocity produced?
  1. 2 fr/sec
  2. 20 fr/sec
  3. 200 fr/sec
  4. 2000 fr/sec
Question: 255   Swimming is possible because of which law of motion?
  1. second
  2. first
  3. third
  4. none of the above
Question: 256   A force of 150 dynes acts on a mass of 50 gms for 5 seconds. What is the acceleration produced?
  1. 4 cms/sec2
  2. 9 cms/sec2
  3. 10c cms/sec2
  4. none of these
Question: 257   The direction of the velocity of a body cannot change, when its acceleration is constant. the statement is
  1. true
  2. false
  3. uncertain
  4. none of the above
Question: 258   What acceleration will a force of 5N impart to a mass of 5 kg?
  1. 5 N/kg
  2. 5M/sec2
  3. 1M/sec2
  4. none of the above
Question: 259   A player caught a cricket ball of mass 150 gm. moving at a rate of 20m/s. If the catching process be completed in 0.1 s. the force of the blow exerted by the ball on the hands is
  1. 3000N
  2. 300N
  3. 30N
  4. 30,000N
Question: 260   When a body is accelerated,
  1. its velocity always changes
  2. its direction always changes
  3. its speed always changes
  4. its falls towards the earth
Question: 261   A force of 100 dynes acts for 10 seconds on a body of mass500g. What is the change in momentum?
  1. 100 C.G.S. units
  2. 10 C.G.S. units
  3. 1000 C.G.S. units
  4. 5000 C.G.S. units
Question: 262   A rope attached to a post in the ground is pulled horizontally with a force of 80 kg. The pole pulls back with a force of
  1. 1000 kg
  2. 80 kg
  3. 40 kg
  4. 160 kg

Answers to the questions of Physics on this page

Following list gives the correct choice for the answer of the Physics mcqs.
249 . B       250 . C       253 . A       254 . C       255 . C       256 . D       257 . B       258 . C       259 . C       260 . A       261 . D       262 . B      

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