An 1850 kg car is moving to the right at a constant speed of 5.00 m/s.

-what is the net force on the car?
-what would be the net force on the car if it were moving to the left?

- 0 N. The car is moving with constant speed so there is no acceleration. Since Force = ma, then force is also 0.

- Assuming the question is saying swap the right direction with the left direction in the question, it would be the same scenario where Force = 0N. The question is a little ambiguous so I can't really answer that question

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.

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge