Two cylinders are in contact along an inclined plane. The upper cylinder (weight is 2.5W) rests against the lower cylinder (weight W), and both are supported by a wall where the contact force is N1. Assume that all friction forces are negligible. An expression for contact force N1 in terms of load variable W is:
(A) 1.75W
(B) 3.5W
(C) 1.57W
(D) 2.01W
(D) 2.01W
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Consider a point on a bicycle wheel as the wheel makes exactly four complete revolutions about a fixed axis. Compare the linear and angular displacements of the point
a. Both are zero. c. Only the linear displacement is zero. b. Only the angular displacement is zero. d. Neither is zero.
A charged particle is placed at rest in the middle of a vacuum chamber, an enclosure that has been emptied of all matter. Consider some point X near a particular corner of the chamber
Neglecting all influences other than the charged particle, what can be said regarding electric fields and electric forces at point X? A) The is an electric field at X, but no electric force. B) There is both an electric field and an electric force at X. C) There is neither an electric field nor an electric force at X. D) There is no electric field at X but there is an electric force at X. E) It is impossible to answer this question without knowing what kind of charge the particle has.
When you hold one end of a solid rod in a fire, the other end becomes hot because of heat convection
a. True b. False Indicate whether the statement is true or false
Sort each statement below into the appropriate bin based on whether it is something that scientists knew about Pluto or its moon Charon before the New Horizons flyby, is something learned as a result of the New Horizons flyby, or is something that seems possible from the New Horizons mission but for which we'll need additional data to establish it with certainty.
What will be an ideal response?