A 0.40-kg particle moves under the influence of a single conservative force. At point A where the particle has a speed of 10 m/s, the potential energy associated with the conservative force is +40 J. As the particle moves from A to B, the force does +25 J of work on the particle. What is the value of the potential energy at point B?
a. +65 J
b. +15 J
c. +35 J
d. +45 J
e. ?40 J
b
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You are asked to select a material for a container on a ship for liquified natural gas that will be at –163°C (–260°F). For the classes of metals, ceramics, polymers, and composites give the advantages and disadvantages of the best possible material within each class of material for this design based upon subjects you have studied in Chapters 1 to 4 in this book. For example you may decide that carbon fiber reinforced epoxy is the best possible composite material for this design. Give the advantages and disadvantages of carbon fiber reinforced epoxy for this design.
What will be an ideal response?
As you go higher and higher above the surface of the Earth, the mass of a body __________
Fill in the blank(s) with correct word
A bird, accelerating from rest at a constant rate, experiences a displacement of 25 m in 12 s. What is its acceleration?
a. 0.18 m/s2 b. 0.35 m/s2 c. 0.44 m/s2 d. 0.26 m/s2 e. 0.53 m/s2
A baseball is thrown by the center fielder (from shoulder level) to home plate where it is caught (on the fly at eye level) by the catcher. At what point does the magnitude of the vertical component of velocity have its maximum value? (air resistance is negligible)
a. just after leaving the center fielder's hand b. just before arriving at the catcher's mitt c. at the top of the trajectory d. the magnitude of vertical component of velocity is constant