a 50 kg boy on ice skates throws a 5 kg ball to the left. if the ball ends up going 20 m/s, how fast is the boy going?

when the use of electricity burdens the fuse and miniarure circuit beakers and there is a possibility of a fuse then they automatically cut off the electricity supply to your homes and after you fix the problem u jzt switch it on and it continues the supply of electricity to ur homes

lol

explanation:

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.

there are no contact forces mentioned on the list of choices that you've provided.