A bowling ball,which can be treated as a solid sphere with a diameter of 21.6 cm and a weight of 33 kg,rolls down a bowling lane at a speed of 21 km/h.The kinetic energy of the bowling ball is
A)785 J.
B)225 J.
C)561 J.
D)1120 J.
E)1430 J.

Question

Quizplus · Accepted Answer

Kinetic energy = (1/2) * mass * velocity^2= (1/2) * 33 kg * (21 km/h)^2= (1/2) * 33 kg * (5.83 m/s)^2= 785 J

A Bowling Ball,which Can Be Treated as a Solid Sphere