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Chapter 1: Q10DQ (page 57)
Can you have zero acceleration and nonzero velocity? Use a graph to explain.
If at any time velocity is constant, then acceleration will be zero.
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Question: How many nanoseconds does it take light to travel 1.00 ft in vacuum? (This result is a useful quantity to remember.)?
You are on the roof of the physics building, above the ground (Fig. P2.70). Your physics professor, who istall, is walking alongside the building at a constant speed of. If you wish to drop an egg on your professor鈥檚 head, where should the professor be when you release the egg? Assume that the egg is in free fall.
(Fig. P2.70)
A small rock is thrown vertically upward with a speed of22.0 m/s from the edge of the roof of a 30.0-m-tall building. Therock doesn鈥檛 hit the building on its way back down and lands onthe street below. Ignore air resistance. (a) What is the speed of therock just before it hits the street? (b) How much time elapses fromwhen the rock is thrown until it hits the street?
The acceleration of a particle is given by . (a) Find the initial velocitysuch that the particle will have the same x-coordinate atas it had at. (b) What will be the velocity at?
While driving in an exotic foreign land, you see a speed limit sign that reads 180,000 furlongs per fortnight. How many miles per hour is this? (One furlong is 1/8 mile, and a fortnight is 14 days. A furlong originally referred to the length of a plowed furrow.)
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