Force || Solved Q/A for S.E.E. - Exam || Part-2

By Pravin Keshari -

FORCE

Part-2 

Very short questions and answers for S.E.E. students

Force

Questions and answers to practice for S.E.E. examination


1) In which direction does the force of gravity act?
Answer: The force of gravity acts towards the center of a planet/the earth.


2) What is 'acceleration due to gravity'? Write down its symbol and the S.I. unit.
Answer: The acceleration produced in a freely falling object due to the influence of gravity is called acceleration due to gravity.
    The symbol of acceleration due to gravity is 'g' and its SI unit is meter per second square (m/s²).


3) What is the value of 'g' on equatorial region and polar region of the earth?
Answer: The value of 'g' at equatorial region is 9.78 m/s² and that on polar region of the earth is 9.83 m/s².


4) What effect will be on acceleration due to gravity if radius of the earth is decreased?
Answer: The magnitude of acceleration due to gravity increases if the radius of earth is decreased by keeping its mass constant ( ∵ g ∝ 1/R²).


5) What will be the weight of an object of mass 50 kg at the center of the earth?
Answer: The weight of the object of mass 50 kg will be zero at the center of the earth.


6) How does a parachute fall towards the surface of moon?
Answer: A parachute falls freely towards the surface of the moon.


7) Where does the weight of a body become maximum on the surface of the earth?
Answer: The weight of a body becomes maximum on the polar region of the earth.


8) Write down the conclusion of Galileo's feather and coin experiment.
Answer: Conclusion of Galileo's feather and coin experiment:
    "The acceleration produced in the freely falling bodies is the same for all the bodies and it does not depend on the mass of the falling bodies in the absence of external resistance."


9) In which condition do a feather and a coin dropped from the same height fall at the same speed?
Answer: A feather and a coin dropped from the same height fall at the same speed during free fall.


10) What is the condition necessary for free fall?
Answer: The condition necessary for free fall is given below:
    An object should only fall under the influence of gravity without any external resistance.

Force

11) What is weightlessness?
Answer: Weightlessness is a condition at which the weight of a body of certain mass becomes zero.


12) When was Newton's law of gravitation propounded?
Answer: Newton's law of gravitation was propounded in 1687 A.D.


        More questions will be given in another blog post.

    ____________________________________________________________________________________


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