Chapter 2: Problem 18
Describe What is the main difference between velocity and speed?
Short Answer
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Chapter 2: Problem 18
Describe What is the main difference between velocity and speed?
These are the key concepts you need to understand to accurately answer the question.
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Get started for freeIt was a dark and stormy night, when suddenly you saw a flash of lightning. Three-and-a-half seconds later you heard the thunder. Given that the speed of sound in air is \(340 \mathrm{~m} / \mathrm{s}\), how far away did the lightning bolt strike? Give your answer in both meters and kilometers.
You jog at \(9.50 \mathrm{~km} / \mathrm{h}\) for \(8.00 \mathrm{~km}\); then you jump into a car and ride an additional \(16.0 \mathrm{~km}\). What average speed must the car have for the average speed for the entire \(24.0-\mathrm{km}\) trip to be \(22.0 \mathrm{~km} / \mathrm{h}\) ?
Explain (a) Is the distance on a round-trip positive, negative, or zero? (b) Is the displacement on a round-trip positive, negative, or zero?
Think \& Calculate Two bumper cars move in a straight line with the following equations of motion: $$ \begin{aligned} &x_{1}=-4.0 \mathrm{~m}+(1.5 \mathrm{~m} / \mathrm{s}) t \\ &x_{2}=8.8 \mathrm{~m}+(-2.5 \mathrm{~m} / \mathrm{s}) t \end{aligned} $$ (a) Which bumper car is has the greater speed? (b) At what time do the bumper cars collide?
Two fish swimming in a river have the following equations of motion: $$ \begin{aligned} &x_{1}=-6.4 \mathrm{~m}+(-1.2 \mathrm{~m} / \mathrm{s}) t \\ &x_{2}=1.3 \mathrm{~m}+(-2.7 \mathrm{~m} / \mathrm{s}) t \end{aligned} $$ Which fish is moving faster?
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