A space ship is coming towards earth from moon at a high speed. The speed of the air ship has to be reduced. A rocket is fired to lower its speed in a certain direction. The rocket should be fired:
Correct answer: A. In the direction towards the earth
- A. In the direction towards the earth
- B. In the direction towards the moon
- C. On the right side of space ship
- D. On the left side of space ship
Explanation
A is the correct answer. Firing the rocket in the direction towards the Earth, opposite to the motion of the spacecraft, will result in a deceleration, helping to reduce its speed.
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
When a man circles round the earth in a satellite, then:
Artificial gravity can be created in the space craft by:
A body in satellite orbiting round the earth is weightless because:
The radius of Earth is 6 x 10^6m. What is the acceleration of a meteor, when it is 8 x 10^6m from the center of the Earth?
A man whose weight is 900 N on the earth's surface goes to a height, which is equal to twice the earth's radius, above the surface of the earth, then the new weight of the man will be:
An object is taken from the earth to a planet where the value 'g' is 20 m/s2, if it is compared with value of 'g' earth, which of the following statement is true?