rate of shear = velocity gradient-Difference in the velocity between two planes of liquid which are divided by the distance between them.

कर्तर वेग, वेग प्रवणता-सूक्ष्म अंतरावर असलेल्या द्रवाच्या दोन प्रतलांच्या वेगातील फरक भागिले प्रतलांधील अंतर.