A toy rocket is launched vertically from ground level (y = 0.00 m), at time t = 0.00 s. The rocket
What will be an ideal response?
A
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You push your physics book across a table. The book weighs 8 N, you push with a steady 5 N force, and the force of friction against the book is 3 N. You push the book a distance of 2 m. The amount of work you do on the book is
A) zero. B) 6 J. C) 16 J. D) 10 J. E) impossible to tell without more information.
You want to store 1,000 J of energy in an ideal spring when it is compressed by only 2.5 cm. What should be the spring constant of this spring?
What will be an ideal response?
Water is flowing through a pipe with a constriction. The diameter of the narrow section is one-third the diameter of the wide section. If the velocity of the incompressible fluid is 3.6 m/s in the narrow section, then what is the velocity of the fluid in the wide section?
A. 2.00 m/s B. 0.80 m/s C. 1.4 m/s D. 1.0 m/s E. 0.40 m/s
When using rays to represent the direction of light, these are drawn
A. perpendicular to the wavefronts B. parallel to the wavefronts C. so they have no relation to the wavefronts