During a launch, why do astronauts typically experience the maximum acceleration immediately before the engines shut off? a because the atmospheric drag is greatest just before we reach orbit b because the spacecraft has lost most of its mass at this point and can accelerate faster c because the Earth's gravity is strongest just before we reach orbit d because we usually increase the thrust dramatically just before achieving orbit
Gravitational force
In nature, every object is attracted by every other object. This phenomenon is called gravity. The force associated with gravity is called gravitational force. The gravitational force is the weakest force that exists in nature. The gravitational force is always attractive.
Acceleration Due to Gravity
In fundamental physics, gravity or gravitational force is the universal attractive force acting between all the matters that exist or exhibit. It is the weakest known force. Therefore no internal changes in an object occurs due to this force. On the other hand, it has control over the trajectories of bodies in the solar system and in the universe due to its vast scope and universal action. The free fall of objects on Earth and the motions of celestial bodies, according to Newton, are both determined by the same force. It was Newton who put forward that the moon is held by a strong attractive force exerted by the Earth which makes it revolve in a straight line. He was sure that this force is similar to the downward force which Earth exerts on all the objects on it.
During a launch, why do astronauts typically experience the maximum acceleration immediately before the engines shut off?
| a |
because the atmospheric drag is greatest just before we reach orbit |
|
| b |
because the spacecraft has lost most of its mass at this point and can accelerate faster |
|
| c |
because the Earth's gravity is strongest just before we reach orbit |
|
| d |
because we usually increase the thrust dramatically just before achieving orbit |
Write the expression for the acceleration (a) spacecraft of the mass m during the launch where its escape velocity ve, the mass of the ejected gas Δm, and the time Δt in which the gas is ejected.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
