Exhibit 4-2

Newton approximated motion in a circle as a series of linear motions, as in the polygon below.







Assume that the particle moves at constant speed vA from A to B, and at constant speed vB from B to C.



Use this exhibit to answer the following question(s).



Refer to Exhibit 4-2. The direction of the acceleration, , at point B, is shown by the arrow in



a.

c

Physics & Space Science

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A 4.00-kg block slides down a frictionless inclined plane with an acceleration 3.00 m/s2. What is the angle of the incline above horizontal?

A) 35.3° B) 45.2° C) 17.8° D) 23.6° E) 53.7°

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Scientific thinking developed only in the past few decades

Indicate whether the statement is true or false

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A pulley system can

A) change the direction of a force. B) multiply a force. C) both of these D) none of the above

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Which of the following would count as a hyperspace?

A) a space in which locating a point requires stating four coordinates B) the surface of a sphere C) a line D) a point E) any space that is moving very quickly

Physics & Space Science