Velocity of the ball will be 11 m/sec after traveling 5 meter
We have given that velocity of ball is 11 m/sec in space
We have to find the speed of the ball after it travels 5 meter
We know that in space there is no force acting
And if there is no force in the ball then velocity of the ball will never change, that is the velocity of the ball is always constant
So the velocity of the ball will be 11 m /sec after traveling 11 m/sec
(This assumption is not quite correct since there is still the force of gravity between the ball and the astronaut, but this force is very very small and can be neglected.)
Assuming there is no force on the ball, Newtown's 1st law says: When viewed in an internal frame of reference, an object either remains at rest or continues to move at a constant velocity, unless acted upon by a force.
If there is no force on the ball, there will be no acceleration on the ball either.
If the acceleration is zero, the velocity of the ball never changes.
whichever one it is, it's definitely not one that you included on the list you provided.
absorption lines are where light has been absorbed by the atom thus you see a dip in the spectrum whereas.
emission spectra have spikes in the spectra due to atoms releasing photons at those wavelengths.