Lakshya Education MCQs

Question: If a body is acted upon by a number of coplanar non-concurrent forces, it may
Options:
A. Rotate about itself without moving
B. Move in any one direction rotating about itself
C. Be completely at rest
D. All of these
Answer: Option D

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Question 1. One kg force is equal to
  1.     7.8 N
  2.     8.9 N
  3.     9.8 N
  4.     12 N
Answer: Option C
Question 2. The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction in which the force acts. this statement is known as
  1.     Newton's first law of motion
  2.     Newton's second law of motion
  3.     Newton's third law of motion
  4.     None of these
Answer: Option B
Question 3. One joule means that
  1.     Work is done by a force of 1 N when it displaces a body through 1 m
  2.     Work is done by a force of 1 kg when it displaces a body through 1 m
  3.     Work is done by a force of 1 dyne when it displaces a body through 1 cm
  4.     Work is done by a force of 1 g when it displaces a body through 1 cm
Answer: Option A
Question 4. The skidding away of the vehicle on a level circular path can be avoided if the force of friction between the wheels and the ground is __________ the centrifugal force.
  1.     Less than
  2.     Greater than
  3.     Equal to
  4.     None of these
Answer: Option B
Question 5. The skidding away of the vehicle on a level circular path can be avoided if the force of friction between the wheels and the ground is __________ the centrifugal force.
  1.     Less than
  2.     Greater than
  3.     Equal to
  4.     None of these
Answer: Option B
Question 6. The efficiency of a lifting machine is the ratio of
  1.     Output to the input
  2.     Work done by the machine to the work done on the machine
  3.     Mechanical advantage to the velocity ratio
  4.     All of the above
Answer: Option D

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