Please verify my work.

15. Inside an elevator, a 63.0 kg student stands on a bathroom spring scale that displays its readings in Newtons. a) What will the scale read if the elevator accelerates upward at 1.50 m/s?? FN 630 Ta = 1.50 m /s ? Fret = Ft - FS FB= mg 94.5 = Ft- 617-4 = 63 ( 9. 3 ) F+ = 711.9 Fo = 617. 4 N = 617.4 N Fret = ma FN J FS = 63(1.50) = 94.5 N a ) FT = 711.90 3 marks b) What magnitude and direction of acceleration would be needed in order to produce a scale reading of 542.0 N? F+ = 711. 9 N Fg = 542. ON M= 63.0kg Fret = F+ - Fg = 711.9 - 542 = 169.9 Fret = ma 169. 9= 63 (a) a = 2. 69 b ) . a = 2 . 7 m / 5 2 = 2.7 m / s' 3 marks c) Under what two types of elevator motion would the scale accurately display the student's weight? Moving at constant velocity of ont moving at all 2 marks Page 8 of 9