A certain white dwarf star was once an average star like our Sun. But now it is

Question

A certain white dwarf star was once an average star like our Sun. But now it is in the last stage of its evolution and is the size of our Moon but has the mass of our Sun.
Estimate gravity on the surface on this star.
=4.38×107 m/s2
Correct
How much would a 69-kg person weigh on this star? Express your answer using two significant figures. w =3.0×109 N Correct Please help with this part What would be the speed of a baseball dropped from a height of 3.0 m when it hit the surface? I got 3.12 and it is incorrect my answer is suppose to be in m/s. Please solve all the way through.
A certain white dwarf star was once an average star like our Sun. But now it is in the last stage of its evolution and is the size of our Moon but has the mass of our Sun.
Estimate gravity on the surface on this star.
=4.38×107 m/s2
Correct
How much would a 69-kg person weigh on this star? Express your answer using two significant figures. w =3.0×109 N Correct w =3.0×109 N Correct w =3.0×109 N Correct w =3.0×109 N Correct w =3.0×109 N Correct w =3.0×109 N Correct w =3.0×109 N Correct w =3.0×109 N Correct w =3.0×109 N Correct w =3.0×109 N Correct w =3.0×109 N Correct w =3.0×109 N Please help with this part What would be the speed of a baseball dropped from a height of 3.0 m when it hit the surface? I got 3.12 and it is incorrect my answer is suppose to be in m/s. Please solve all the way through.
What would be the speed of a baseball dropped from a height of 3.0 m when it hit the surface? I got 3.12 and it is incorrect my answer is suppose to be in m/s. Please solve all the way through.

Explanation / Answer

   vf2   =   vi2   +   2 * g * h    vf2   =   02   +   2 * 4.38 * 107 * 3.0    final velocity as the ball hits the surface   vf   =   v(2.628 * 108)                                                                      =   1.62 * 104   m/s

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