alleryFor a satellite in a circular orbit, the centripetal acceleration is provided by:
- magnetic force
- friction
- gravitational force
- nuclear force
Show answer and solution
Correct answer: C. gravitational force
Gravity supplies the centripetal force.
NEET UG Unit 1C: Kinematics: Relative & Circular Motion — practice questions — page 2
Explore 33 free Unit 1C: Kinematics: Relative & Circular Motion questions in NEET UG Physics. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 31–33 of 33.
For a satellite in a circular orbit, the centripetal acceleration is provided by:Read the answer and worked solution →For a particle dropped from rest from a height much greater than R toward Earth (ignore air), the speed at impact equals approximately:Read the answer and worked solution →For a satellite of mass m in a circular orbit of radius r around a planet of mass M, the total mechanical energy is:Read the answer and worked solution →
Worked practice questions
For a particle dropped from rest from a height much greater than R toward Earth (ignore air), the speed at impact equals approximately:
- √(2GM/R)
- √(2gR)
- √(GM/R)
- √(gR)
Show answer and solution
Correct answer: A. √(2GM/R)
Energy conservation: ½v² = GM/R ⇒ v = √(2GM/R), the escape speed.
For a satellite of mass m in a circular orbit of radius r around a planet of mass M, the total mechanical energy is:
- − G M m / (2r)
- − G M m / r
- + G M m / (2r)
- zero
Show answer and solution
Correct answer: A. − G M m / (2r)
E = K + U = (1/2)·GMm/r − GMm/r = − GMm/(2r).
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