Aspacecraft's landing is cushioned by air bags. as it lands on mars, the velocity of downward fall is 20 meters/second. immediately after impact the velocity is 10 meters/second. if the spacecraft has a mass of 7.1 × 104 kilograms, what is the value of the impulse?

Thank you for posting your question here in . Below are the choices that can be found elsewhere.

A. 1.2 x 10^4
B. 2.2 x 10^5
C. 7.1 x 10^5
D. 3.6 x 10^4

The answer is C that means to say that the velocity after impact is still in the same direction as when the spaceship is falling.

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.