wants to determine the amount of frictional torque in their current line of grin

Question

wants to determine the amount of frictional torque in their current line of grindstones, modes, which is basically a diskshaped grindstone of mass 1.5 kg and radius 6.70 cm to stop rotating. so they can redesign them to be more energy efficient. To do this, they ask you to test the best-selling power is shut of, you time the grindstone and nnd it takes 313·for (e) What is the angular acceleration of the grindstone? (Assume constant angular accetieration) x rad/s (b) What is the frictional torque exerted on the grindstone? 0 0086 N-m Use the definition of angular acceleration to find the angular acceleration of the grindstone Applying Newton's force acting on the grindstone second law in rotational form wilt liow you to fnd the tornque exerted by the riction

Explanation / Answer

= /t

= -760rev/min * 2 rad/rev * 1min/60s / 31.3s

= - 2.542 rad/s²

= I

= 1/2 * 1.5kg * (0.067m)^2 * 2.542rad/s²

= 0.0086 N·m

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