A joule/meter (J/m) is a unit of
a. force.
b. work.
c. energy.
d. power.
a
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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 mass is at the lowest point on the circle, the speed of the mass is 12 m/s. What is the magnitude of the force of the string on the mass at this position?
A. 31 N B. 36 N C. 41 N D. 46 N E. 23 N
A circular loop of wire of cross-sectional area 0.12 m2 consists of 200. turns, each carrying 0.50 A. It is placed in a magnetic field of 0.050 T oriented at 30° to the plane of the loop. What torque acts on the loop?
What will be an ideal response?
The conversion of solar radiation into chemical energy by plants that releases oxygen is called
A) plant succession. B) photosynthesis. C) dendrochronology. D) deforestation. E) podzolization.
Angular Momentum: When is the angular momentum of a system constant?
A. Only when its total kinetic energy is constant. B. Only when no net external force acts on the system. C. Only when the linear momentum and the energy are constant. D. Only when no net external torque acts on the system. E. Only when the moment of inertia is constant.