A team of astronauts is on a mission to land on and explore a large asteroid. In

Question

A team of astronauts is on a mission to land on and explore a large asteroid. In addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. With what minimum initial speed vesc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? Assume that the asteroid is approximately spherical, with an average density = 2.28 × 106 g/m3 and volume V = 2.86 × 1012 m3. Recall that the universal gravitational constant is G = 6.67 × 10-11 N·m2/kg2.

A team of astronauts is on a mission to land on and explore a large asteroid. In addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. With what minimum initial speed Vesc will the rocks need to be thrown in order for them never to "fall" back to the asteroid Assume that the asteroid is approximately spherical, with an average density -2.28 x 10° gm3 and volume V: 2.86 x 10% m3. G 6.67 x10" N m2lkg2 Recali that the universal gravitational constant is Number m/s Vest

Explanation / Answer

Calculate the Radius r.

4/3*pi*r^3=2.86*10^12

r=8807.09 m

Mass of asteroid= density *volume

= 2.28*10^3*2.86*10^12=6.52*10^15kg

THe total energy of the asteroid rock system is zero once it has escaped the asteroid. Therefore by energy balance,

-GMm/r+0.5mv^2=0

-6.673*10^-11*6.52*10^15*m/8807.09+0.5*m*v^2=0

Solving for v,

v=9.94 m/s

Please rate if it correct

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