Ablock of 7.80 kg kept on an inclined plane just begins to slide at an angle of inclination of 35.0°. once it has been set into motion, the angle is reduced to 30.0° to keep the block moving at constant speed. calculate the maximum force of static friction and the force of kinetic friction for the surfaces in contact.

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air