For an abrasive,the higher the speed,the greater the frequency per unit of time the particle contacts the surface.In a clinical situation it is easiest to control pressure rather than speed to vary the rate of abrasion. January 2, 2023 by admin Both statements are true. Both statements are false. The first statement is true; the second statement is false. The first statement is false; the second statement is true. See Answer The first statement is true; the second statement is false.