Question

a grinding machine wheel measuring 20cm in diameter rotates 2800rev/min.its cutting speed in m/s is ..??
please explain​

Answer 1

Answer:29.3m/s

Explanation:

Convert ang. Freq to SI units and later to ang. velocity.

(2800×2×3.14)÷60=omega

Then using V=omega×radius,

V=(10×10^-2)×omega = (28×3.14)÷3 =29.3m/s