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NEET UG Gravitation — practice questions — page 3

Explore 126 free Gravitation questions in NEET UG Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Gravitation questions and exercises with answers

Showing questions 61–90 of 126.

Complete the weightlessness explanationRead the answer and worked solution →True or false: weightlessnessRead the answer and worked solution →Kepler's third lawRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Tap every quantity conserved for orbital motionRead the answer and worked solution →Flip and pair: law with what it saysRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Order the reasoning: why an astronaut floatsRead the answer and worked solution →True or false: Kepler's lawsRead the answer and worked solution →Which law is being described?Read the answer and worked solution →Orbits and satellitesRead the answer and worked solution →Tap every true statement about orbital motionRead the answer and worked solution →Complete Kepler's third lawRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Flip and pair: statement with its subjectRead the answer and worked solution →Assertion and reason: orbitsRead the answer and worked solution →Naked eye observations of the planets were recorded by:Read the answer and worked solution →Tycho Brahe came from the country of:Read the answer and worked solution →Brahe's compiled data were analysed by his assistant:Read the answer and worked solution →Kepler extracted from the data how many laws?Read the answer and worked solution →Kepler's laws enabled Newton to propose his universal law of:Read the answer and worked solution →By the law of orbits, planets move in orbits that are:Read the answer and worked solution →In a planet's elliptical orbit, the Sun sits at:Read the answer and worked solution →The point of a planet's orbit closest to the Sun is the:Read the answer and worked solution →The point of a planet's orbit farthest from the Sun is the:Read the answer and worked solution →The semimajor axis of an orbit is half the distance from:Read the answer and worked solution →The law of orbits departed from the model that allowed only:Read the answer and worked solution →An ellipse of which the circle is a special case is a curve that is:Read the answer and worked solution →

Worked practice questions

Complete the weightlessness explanation

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Missing parts
  1. Answer
    not
    Choices
    1. not
    2. partly
    3. entirely
  2. Answer
    free fall
    Choices
    1. free fall
    2. vacuum
    3. darkness
Complete the statement
An astronaut in orbit feels weightless. This is {0} because gravity is weak at that height. It is because the astronaut and the satellite are both in {1}.
The chapter is explicit that weak gravity is NOT the reason. Source: syllabus Physics, Ch 7 Gravitation.

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True or false: weightlessness

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Questions
  1. Statement is true
    Yes
    Statement
    An astronaut in a satellite experiences weightlessness.
  2. Statement is true
    No
    Statement
    It happens because gravity is very small up there.
  3. Statement is true
    Yes
    Statement
    It happens because astronaut and satellite fall together.
  4. Statement is true
    Yes
    Statement
    Gravity is still substantial at satellite altitudes.
  5. Statement is true
    No
    Statement
    Weightlessness means gravity has switched off.
The commonest misconception in this chapter, corrected. Source: syllabus Physics, Ch 7 Gravitation.

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Kepler's third law

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Questions
  1. Question
    Kepler's third law relates the period squared to the radius
    Choices
    1. cubed
    2. squared
    3. unchanged
    Correct choice
    cubed
  2. Question
    The constant in that law is
    Choices
    1. different for every planet
    2. the same for all planets in circular orbits
    3. always one
    Correct choice
    the same for all planets in circular orbits
  3. Question
    The same law applies to
    Choices
    1. falling apples only
    2. nothing else
    3. satellites orbiting the Earth
    Correct choice
    satellites orbiting the Earth
  4. Question
    Kepler's second law follows from conservation of
    Choices
    1. angular momentum
    2. linear momentum
    3. mass
    Correct choice
    angular momentum
T² = K R³, with the same constant for all planets in circular orbits. Source: syllabus Physics, Ch 7 Gravitation.

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