Clarifications. Although you can contribute to a Roth IRA during your retirement years, you cannot contribute unlimited amounts of money. The IRS enforces contribution limits for traditional and Roth IRAs regardless of age. In 2010, for example, you could contribute $6,000 if you are older than 50.
The formula for determining the velocity of a falling object after a time of t seconds is vf = g * t (dropped from rest) where g is the acceleration of gravity. The value for g on Earth is 9.8 m/s/s. The above equation can be used to calculate the velocity of the object after any given amount of time when dropped from rest. Example calculations for the velocity of a free-falling object after six and eight seconds are shown below. Example Calculations:
The astronauts, the ISS itself and other objects in Earth orbit arenât floating, they are actually falling. But they donât fall to the Earth because of their huge orbital velocity. Instead, they fall around Earth. Objects in Earth orbit have to travel at least 28,160 km/h (17,500 mph). So, as they accelerate towards the Earth, the Earth curves away beneath them and they never get any closer. Since the astronauts have the same acceleration as the space station, they feel weightless.