A 10-m uniform beam weighing 100 N is supported by two vertical ropes at its ends. If a 400-N person sits at a point 2.0 m from the left end of the beam, what is the tension in each rope?
What will be an ideal response?
370 N (left rope), 130 N (right rope)
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The contact force F between the two cylinders in Problem 3.3 may be expressed in terms of load variable W as:
(A) 1.82W (B) 2.5W (C) 2.1W (D) 1.52W
An object is discovered near the earth with values of 2E/m = 2.12 × 107 m2/s2 and L/m = 7.8 × 1010 m2/s. This object is in what kind of orbit around the earth?
A. Elliptical B. Parabolic C. Hyperbolic
A loop of wire in a generator produces alternating current by:
a. rotating in a constant electric field. b. rotating through areas of high and low electrical force. c. creating current by rotating in an existing magnetic field. d. creating a varying magnetic field with its rotational kinetic energy. e. being wound around a metal core to produce an electromagnet.
Atomic Nucleus: Atomic nuclei that are all isotopes of an element all have the same
A. number of nucleons. B. mass. C. number of protons. D. number of neutrons.