What is the magnetic force on a proton that is moving at 3.8 x 10 m/s up
through a magnetic field that is 0.72 T and pointing toward you?

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles