If - = and A – B = C, then the vectors and are oriented perpendicular relative to one other
Indicate whether the statement is true or false
FALSE
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If the speed of an object in uniform circular motion is tripled while the radius remains constant the centripetal acceleration is multiplied by a factor of
A. 9 B. 3 C. 1 D. 1/3 E. 1/9
Which of the following is NOT a solution to the Fermi Paradox?
A) no one is interested or able to communicate B) we are unable to detect their communications C) we are not interested in communicating D) no one is out there
An object is moving to the right in a straight line. The net force acting on the object is also directed to the right, but the magnitude of the force is decreasing with time. The object will
A) continue to move to the right, with its speed increasing with time. B) continue to move to the right, with its speed decreasing with time. C) continue to move to the right with a constant speed. D) stop and then begin moving to the left.
Exhibit 13-1
Two blocks of masses m1 and m2 are connected by a light cord that passes over a pulley of mass M, as shown. Block m2 slides on a frictionless horizontal surface. The blocks and pulley are initially at rest. When m1 is released, the blocks accelerate and the pulley rotates.
?
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Use this exhibit to answer the following question(s).
Refer to . The total angular momentum of the system of the two blocks and the pulley relative to the axis of rotation of the pulley is
a.
proportional to the radius of the pulley.
b.
proportional to the speed of the blocks.
c.
proportional to the length of the string.
d.
to all of the above.
e.
only to (a) and (b) above.