pomagajte molim vas please please please zadatci iz fizike

HELPPPPPPPPPPPPP brzo PLEASEEEEEEEEEEEEEEEEE.Ukrao sam od profesora fizike sa njegovog stola kontrolni da bih mogao da prepravim pa da mu vrati u ponedeljak.Počeo sam da ludim od ovih zadataka.Pomagajte please.Davao nam je samo čega je i koliko dato u zadatku.Ne text.
1.čestica mase m=0.6 g;q=3*10-4<sup>;ugao=90;B=0.5T;V=30m/s;r=?
2.B=0.2T;E=100 kW/m;V=?
3.U=100W;E=1.6*10-19 C;m=9*10-31 kg.

POMAGAJTE MOLIM VASSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS.
PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE.</sup>