Chapter 2: Q19CQ (page 79)
What is the last thing you should do when solving a problem? Explain.
After solving the problem, the last thing to do is to check that the answer matches the real-life situation.
Over 30 million students worldwide already upgrade their learning with Vaia!
All the tools & learning materials you need for study success - in one app.
Get started for free
A bullet in a gun is accelerated from the firing chamber to the end of the barrel at an average rate of\({\bf{6}}{\bf{.20 \times 1}}{{\bf{0}}^{\bf{5}}}\;{\bf{m/}}{{\bf{s}}^{\bf{2}}}\)for\({\bf{8}}{\bf{.10 \times 1}}{{\bf{0}}^{{\bf{ - 4}}}}\;{\bf{s}}\). What is its muzzle velocity (that is, its final velocity)?
Tidal friction is slowing the rotation of the Earth. As a result, the orbit of the Moon is increasing in radius at a rate of approximately. Assuming this to be a constant rate, how many years will pass before the radius of the Moon’s orbit increases by ?
(a) Sketch a graph of velocity versus time corresponding to the graph of displacement versus time given in Figure 2.55.
(b) Identify the time or times ( ta , tb , tc , etc.) at which the instantaneous velocity is greatest.
(c) At which times is it zero?
(d) At which times is it negative?
Is it possible for speed to be constant while acceleration is not zero? Give an example of such a situation.
Is it possible for velocity to be constant while acceleration is not zero? Explain.
What do you think about this solution?
We value your feedback to improve our textbook solutions.
