An astronaut in space with a life belt is attached to the spaceship outside. If the life belt is cut by accident:
Correct answer: A. He will continue moving in the orbit
- A. He will continue moving in the orbit
- B. He will fall to the earth
- C. He will go to the outer space
- D. None of these
Explanation
A is correct. As the astronaut was initially in a stable orbit around a celestial body (like Earth) and then the life belt was cut, the astronaut would continue to move in the same orbit unless acted upon by external forces. This is due to the principle of conservation of angular momentum in the absence of significant external forces.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Gravitation
Newton’s law of universal gravitation relates the force between masses to their masses and separation, while gravitational field strength explains weight and orbital motion. The topic covers satellite velocity and period, escape ideas, weightlessness in free fall, and artificial gravity, which differs from ordinary gravitational attraction.
Practise Gravitation
265 free Gravitation MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 11 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Gravitation questions
Which of the following does not affect g?
A tunnel is bored through the centre of the earth and a pebble is dropped, then it:
Which one of the following is not a universal constant?
The apparent weight of a body of 15 kg mass placed in a spaceship orbiting the earth at a speed of 3000 m/sec at a height of 500 m will be:
An elevator initially accelerates upward from rest and then ascends with uniform speed. The time period of a simple pendulum in the elevator will:
Assume the earth to be homogeneous. Scientist A goes deep down in a mine and Scientist B goes up in a balloon. The value of g measured by: