How many miles per hour is this? (Note 1 mile = 1609m) or you can multiply your answer in 3b x 2.2379

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach

higher potential

explanation:

because it is in a high speed so it must move into a of high potential