You push on a cart (18.0kg) at a 30 degree below horizontal angle. the coefficient of kinetic friction between the chair and the floor is 0.625. what is the value of the angled force that will keep the chair moving at a constant velocity?

Which of the following describe possible scenarios? a) an object has zero instantaneous velocity and non-zero acceleration. b) an object has negative acceleration and is speeding up. c) an object has positive acceleration and constant velocity. d) an object has positive velocity and zero acceleration. e) an object has increasing positive position and negative velocity. f) an object has decreasing positive position and negative acceleration.