# answerkeys4 - 5m s b velocity = Δ d Δ t =50m 22s = 2 27m...

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Answer Key for problems in Unit IV. 1. a) Total traveled distance = 5 miles + 7 miles = 12 miles Final displacement vector = { -5 miles(down) + 7 miles(up) , N } = { 2 miles , N } b) Total traveled distance = 5 miles + 7 miles = 12 miles Final displacement vector has 5 2 + 7 2 mi = 8.6 mi magnitude ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡± - 6 E 7 mi 5 2 + 7 2 mi N 5 mi 2. a) velocity = Δ d/ Δ t =50m / 20s = 2
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Unformatted text preview: . 5m / s b) velocity = Δ d/ Δ t =50m / 22s = 2 . 27m / s c) For the round trip, the total displacement is ”0”. Therefore, the veloc-ity is 0. (However, speed = 100m 42s = 2 . 38m / s). 7. a) 85 mph - 65 mph = 25 mph b) (-65 mph) - 65 mph = 130 mph (- sign of the ﬁrst 65 mph means opposite direction.) 1...
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