please help with a, b, c, d

1. Calculate the magnitude of the normal force on a 15.0 kg block in the following circumstances: Hint - draw a free body diagram for each case and sum the forces along the "n" axis to find the normal force. Answers: (a) 147 N (b) 127 N (c) 192 N (d) 210. N (a) The block is resting on a level surface all forces all ma's (b) The block is resting on a surface tilted up at 30.0 angle with respect to the horizontal all forces all ma's (c) The block is resting on the floor of an elevator of an elevator that is accelerating upwards at 3.00 m/s2 (d) The block is on a level surface and a force of 125 N is exerted on it at an angle of 30.0 above the horizontal