McqMate
| Q. |
The sensation of weightlessness in a spacecraft in an orbit is due to the – |
| A. | Absence of gravity outside |
| B. | Acceleration in the orbit which is equal to the acceleration due to gravity outside |
| C. | Presence of gravity outside but not inside the spacecraft |
| D. | Fact that spacecraft in the orbit has no energy |
| Answer» B. Acceleration in the orbit which is equal to the acceleration due to gravity outside | |
|
Explanation: Weightlessness in space is caused by the simple physical factors that cause the limitation of gravity. While on Earth, external forces are pushing or pulling on a person's body, however when a spacecraft enters orbit, the people and objects aboard the craft enter a state of free fall. Essentially, the vehicle and all of its contents are falling towards the Earth causing the sensation of weightlessness similar to the state a person feels when enjoying the amusement park ride. Many people believe that a lack of gravity is the root cause for weightlessness in space. |
|
View all MCQs in
PhysicsNo comments yet