A child is standing at the rim of a rotating disk holding a rock, and throws a rock in direction (2) at the instant shown. The disk rotates freely without friction. What happens to the angular speed of the disk?
1
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The motion of a particle connected to a spring is described by x = 10 sin (?t). At what time (in s) is the potential energy equal to the kinetic energy?
A. 0 B. 0.25 C. 0.50 D. 0.79 E. 1.0
The siphon shown is used to transfer liquid from a higher level to a lower level. If the fluid is drawn up and is continuous through the tube, determine the velocity of flow of gasoline if the vertical distance from the liquid surface to the outlet is 1.0 m.
A. 1.1 m/s B. 2.2 m/s C. 4.4 m/s D. 9.8 m/s E. 6.5 m/s
The corona can reach temperatures of up to ____
a. 500,000 K b. 1,000,000 K c. 10,000 K d. 5800 K e. 2,000,000 K
A 60-kg swimmer dives from a 150-kg raft with a horizontal speed of 1.5 m/s
The raft is initially at rest. What is the speed of the raft immediately after the diver jumps?