You need to find out what the average gpa is there in those majors. Do they check gpa after each semester or each spring? If you get below the required gpa what happens, is there a grace period to raise gpa, can you get the scholarship back after losing it?
And you should plan to work hard regardless, higher gpa might mean better internship/co-op chances, maybe additional scholarships, better job prospects or grad school chances after graduation.
Plan to join study groups, ask professors for help and take advantage of tutoring offered if you run into difficulties.