A golfer misjudges a putt and leaves her ball way short, the ball going only one-third of the way to the hole
If the speed of the ball leaving the putter in the first case was v0 and the force of resistance due to the grass remains the same, what speed should she have given to the ball to make the original putt? A) v0
B) 2 v0
C) v0
D) 3 v0
E) 4 v0
C
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A 0.50-kg mass attached to the end of a string swings in a vertical circle (radius = 2.0 m). When the string is horizontal, the speed of the mass is 8.0 m/s. What is the magnitude of the force of the string on the mass at this position?
A. 16 N B. 17 N C. 21 N D. 11 N E. 25 N
All quarks have 1/3 the electric charge of an electron
a. True b. False Indicate whether the statement is true or false
The captain of a spaceship orbiting planet X discovers that to remain in orbit at from the planet's center, she needs to maintain a speed of What is the mass of planet X? (G = 6.67 × 10-11 N ? m2/kg2 )
A) 2.8 × 1019 kg B) 4.2 × 1017 kg C) 2.8 × 1016 kg D) 4.2 × 1014 kg
A segment of wire of total length 3.0 m carries a 15-A current and is formed into a semicircle. Determine the magnitude of the magnetic field at the center of the circle along which the wire is placed
a. 1.6 ?T b. 4.9 ?T c. 1.0 ?T d. 9.8 ?T e. 15 ?T