Religion

Problem Set #2 Solutions:

Chapter 3:
Ex. 3.4: One planer travels due north at 300 km/h. magical spell another travels due south at 300 km/h. Are their speeds the same? Are their velocities the same? Explain.

settlement: Their speeds atomic number 18 the same; speed is a scalar, and refers onto to how spendthrift you atomic number 18 traveling, not to your electric charge of travel. Their velocities are not the same, because velocity is a vector, and includes direction as well as speed. (In other words, speed is the order of magnitude of the velocity vector.)

Ex. 3.5: Light travels in a straight line, at a unvaried speed of 300,000 km/s. (Note: the book has a typo here, and gives the wrong speed for debile.) What is the acceleration of light?

resoluteness: The acceleration of light is zero; the velocity (both speed and direction) of light remain constant as it travels.

Ex. 3.6: Can an automobile with a velocity toward the north have an acceleration toward the south? Explain.

resultant role: Yes. When an objects acceleration is in the opposite direction from its velocity, the object is subnormality down.

Ex. 3.15: Cite an example of something with constant speed that also has a varying velocity. Can you cite an example of something with a constant velocity and a varying speed? Defend your examples.

Answer:
Const.



speed and varying velocity: a runner abject in a circle at constant speed. (She is palliate accelerating, because the direction of her velocity is changing.)

Const. velocity and varying speed: this one is impossible. If your velocity is constant, that means that both your speed and direction are constant.

Ex. 3. 32: If you drop an objectits acceleration toward the ground is 10 m/s2. If you throw an object downward instead, would its acceleration after you lay off it be greater than 10 m/s2? Why or why not?

Answer: No matter how fast the object is moving when you release it, its acceleration after you allow it go will still be 10 m/s2. (I am assuming here that after you release...If you want to bear a full essay, order it on our website: Ordercustompaper.com



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