Aball was kicked upward at a speed of 64.2 m/s. how fast was the ball going 1.5 seconds later

The ball's velocity at time is

where is the acceleration due to gravity. So after 1.5 seconds, the ball's velocity is

so the ball's speed after 1.5 seconds is also 49.5 m/s.

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.

they should be similar or the same