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General Science

SECOND LAW MOTION MCQs

Total Questions : 20

Page 1 of 2 pages
Question 1. What is Newton's second law of motion?
  1.    For every action, there is an equal and opposite reaction. The statement means that in every interaction, there is a pair of forces acting on the two interacting objects
  2.    The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
  3.    an object at rest will stay at rest and an object in motion will stay in motion with the same speed and direction unless acted upon by an unbalanced force.
 Discuss Question
Answer is Option B. -> The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
Question 2. A machine gun fires a bullet of mass 40 g with a velocity of 1200 m s − 1
  1.    One
  2.    Two
  3.    Three
  4.    Four
 Discuss Question
Answer is Option C. -> Three
Question 3. What is the accelerating force on the Diwali rocket if it ejects 0
  1.    20 N
  2.    20 dynes
  3.    1000 N
  4.    22 dynes
 Discuss Question
Answer is Option A. -> 20 N
Question 4. On a body of 20 kg, a force of 10 N acts for 10 seconds
  1.    1000 kg.m/s
  2.    200 kg.m/s
  3.    100 kg.m/s
  4.    5 kg.m/s
 Discuss Question
Answer is Option C. -> 100 kg.m/s
Question 5. Newton’s second law of motion relates an object’s acceleration to
  1.    it's mass.
  2.    its velocity.
  3.    the net force acting on it.
  4.    two of the above
 Discuss Question
Answer is Option D. -> two of the above
Question 6. What is the velocity of a body of mass 5 gm if a force of 100 dynes acts on the body for 10 seconds?
  1.    2 cm/sec
  2.    20 cm/sec
  3.    200 cm/sec
  4.    2000 cm/sec
 Discuss Question
Answer is Option C. -> 200 cm/sec
Question 7. Mass of the object is quantitative measure of its inertia stated law is newton's
  1.    first law
  2.    second law
  3.    third law
  4.    fourth law
 Discuss Question
Answer is Option A. -> first law
Question 8. "Every action has an equal and opposite reaction" is newton's
  1.    first law
  2.    second law
  3.    third law
  4.    fourth law
 Discuss Question
Answer is Option C. -> third law
Question 9. Newton’s second law of motion gives us a measure of:
  1.    force
  2.    momentum
  3.    inertia
  4.    acceleration
 Discuss Question
Answer is Option A. -> force
Question 10. An object of mass of 2 kg is sliding with a velocity of 4 ms-1 on a frictional horizontal surface
  1.    2 N
  2.    4 N
  3.    8 N
  4.    0 N
 Discuss Question
Answer is Option C. -> 8 N
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