A 0.5 kg fish, hooked as shown below, starts to swim away at a speed of 3 m/s. The angular momentum of the fish relative to the hand holding the fishing rod is about
A.
.B.
.C.
.D.
.E.
.Answer: A
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What is the direction of 
at point Q?
A. A B. B C. C D. D E. E F. F T. Zero
Two spaceships, each 100 m long in its own rest frame, approach Earth from opposite directions, with equal speeds relative to Earth. As measured by a passenger in one of the spaceships, the other spaceship is 96 m long
What is the speed of the spaceships relative to Earth? A) c/7 B) c/6 C) c/5 D) c/4 E) c/3
A beam of electrons is accelerated through a potential difference of 1.0 kV before entering a velocity selector. If the magnetic field of the velocity selector has a magnitude of 0.010 T,
what magnitude of the electric field is required if the electrons are not to be deflected as they pass through the velocity selector? ((e = 1.60 × 10-19 C, melectron = 9.11 × 10-31 kg) A) 5.9 × 103 V/m B) 6.0 × 105 V/m C) 7.2 × 106 V/m D) 1.9 × 105 V/m E) 1.1 × 105 V/m
A small boat is moving at a velocity of 3.35 m/s when it is accelerated by a river current perpendicular to the initial direction of motion. If the acceleration of the current is 0.750 m/s2, what will be the new velocity of the boat after 33.5 s?
A) 25.3 m/s at 82.4° from initial direction of motion B) 25.3 m/s at 7.59° from initial direction of motion C) 640.1 m/s at 82.4° from initial direction of motion D) 640.1 m/s at 7.59° from initial direction of motion