Just answers no work needed A wheel of radius 2m s undergoing rotational motion.

Question

Just answers no work needed

A wheel of radius 2m s undergoing rotational motion. If it undergoes a rotational displacement of 100 radians, what translational displacement has it undergone? Select One of the Following: (a) 50m (b) 100m (c) 200m (d) 300m (e) 2000m A wheel of radius 1 m is undergoing rotational motion. If it has a rotational velocity of 100 rad/sec. what is its center-of-mass velocity? Select One of the Following: (a) 50zm/s (b) 100m/s (c) 150m/s (d) 200m/s A net torque of 200Nm is exerted on a sphere through one complete rotation. What is the change in kinetic energy of the sphere due to the torque? Select One of the Following: (a) 3.1 (b) 20.J (c) 126.J (d) 3t600J (e) 7200.J

Explanation / Answer

21.1

displacement = 2 * 100

displacement = 200 m

b)

for rolling ,

speed of com = r*w

v = 1 * 100 = 100 m/s

c)

here ,

change in KE = work done

Change in KE = 20 * 2*pi

Change in KE   = 126 J

the change in kinetic energy is 126 J

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