Conservation of Momentum: A 1200-kg cannon suddenly fires a 100-kg cannonball at 35 m/s. What is the recoil speed of the cannon? Assume that frictional forces are negligible and the cannon is fired horizontally.
A. 2.9 m/s
B. 35 m/s
C. 3.5 m/s
D. 3.2 m/s
Answer: A
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A CD has a diameter of 12.0 cm. If the CD is rotating at a constant angular speed of 200 revolutions per minute, then the tangential velocity of a point on the circumference is
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How long does it take an M-type star to reach the main sequence, compared to a solar-type star?
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