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thedudereturns
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Consider a man having superpower,weighing 70 kg jumping from moon to reach Earth in 10sec..what's the speed at which he travels..considering gravity etc...
Gravity won't do much at that speed over this short period.thedudereturns said:from moon to reach Earth in 10sec..what's the speed at which he travels..considering gravity etc...
So is it simple d/t or do we have to consider anything else ..he is jumping...to Earth from moonA.T. said:Gravity won't do much at that speed over this short period.
Ignoring all of the impossibilities, yes. It's simple d/t. He's moving at something like 15% of the speed of light.thedudereturns said:So is it simple d/t or do we have to consider anything else ..he is jumping...to Earth from moon
Pardon me ..didn't quite understood what you said...please do explainCWatters said:and over 10s gravity adds about 14m/s. You get more error by not specifying which bit of the Earth he lands on.
Understand*thedudereturns said:Pardon me ..didn't quite understood what you said...please do explain
The man is traveling in the neighborhood of 40 million meters per second. Most of that time will be spent far from the Earth and far from the moon where the acceleration from gravity is low. @CWatters has done some work and obtained an estimate of 14 meters/sec2 for average acceleration over the ten second interval.thedudereturns said:Pardon me ..didn't quite understood what you said...please do explain
Which is nothing compared to the variation in the distance between the Earth and the Moon.CWatters said:You get more error by not specifying which bit of the Earth he lands on.
jbriggs444 said:Note that the radius of the Earth is 6000 km. It's not just how high a mountain you land on. Whether you land dead center or nearer the horizon is even more important
You turn right off the M11 motorway and drive about 1 hr in NE direction if you started in LondonPeroK said:This reminds me of "The man in the moon came down too soon and asked the way to Norwich ...".
The "speed of man in the moon question" refers to the common misconception that the speed at which a person jumps on Earth would be the same as their speed if they were to jump on the moon. This is due to the assumption that the moon's gravity is the same as Earth's, when in fact it is about one-sixth of Earth's gravity.
The speed of a person on the moon is different from on Earth because of the difference in gravitational pull. The moon's gravity is much weaker than Earth's, so objects and people will fall at a slower rate on the moon compared to Earth.
The lower gravity on the moon actually makes it easier for spacecraft to land and take off compared to Earth. However, once in space, the speed of a spacecraft is not affected by the moon's gravity because it is already in a state of constant motion.
The actual speed of a person on the moon depends on many factors, such as their initial force and angle of jump, as well as the moon's gravity. However, the average speed of a person on the moon is about 1.6 meters per second, compared to about 9.8 meters per second on Earth.
Understanding the speed of a person on the moon is important for many reasons. It helps scientists and engineers design and plan for space missions, as well as understand the physical differences between Earth and the moon. It also helps dispel common misconceptions and promotes scientific literacy.