Simple harmonic motion
A. occurs when there are no forces on the system
B. requires a constant force
C. requires a force which is not constant, but varies directly with position
D. requires a force which is not constant, but varies inversely with position
C. requires a force which is not constant, but varies directly with position
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A pulsar requires that a neutron star I. rotate rapidly. II. have a radius of at least 10 km. III. have a strong magnetic field. IV. rotate on an axis that is different from the axis of the magnetic field
a. I & III b. I & IV c. II, III, & IV d. I, III, & IV e. I, II, III, & IV
Determining the velocity of an object influenced by a changing acceleration
A. Is easier using energy conservation B. Can be done using kinematics or conservation with equal difficulty C. Is easier using kinematics D. Is impossible
Is it possible to see a waxing crescent moon on the overhead meridian at 10 A.M. local time? How about at 4 P.M. local time? Explain your answers
A stunt pilot weighing 0.70 kN performs a vertical circular dive of radius 0.80 km. At the bottom of the dive, the pilot has a speed of 0.20 km/s which at that instant is not changing. What force does the plane exert on the pilot?
a. 3.6 kN up b. 4.3 kN up c. 2.9 kN down d. 2.9 kN up e. 5.8 kN down