A solid uniform ball with a mass of 125 g is rolling without slipping along the horizontal surface of a table with a speed of 4.5 m/s when it rolls off the edge and falls towards the floor, 1.1 m below.
What is the rotational kinetic energy of the ball just before it hits the floor? A) 0.51 J
B) 0.73 J
C) 1.1 J
D) 2.6 J
E) This question cannot be answered without knowing the radius of the ball.
Question 2
A wheel having a moment of inertia of 5.00 kg m2 starts from rest and accelerates under a constant torque of 3.00 N m for 8.00 s. What is the wheel's rotational kinetic energy at the end of 8.00 s?
A) 57.6 J
B) 64.0 J
C) 78.8 J
D) 122 J
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