Homework #2.docx

# Homework #2.docx - 1 Assuming that a rabbit runs at a speed...

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1. Assuming that a rabbit runs at a speed of 12.0 meters per second. How far would the rabbit travel in 11.5 seconds? 12.0 m 1 s X 11.5 s = 138 m 2. A hiker takes a hiking trip around the camp. He first travels 5.10 km in one hour at a constant speed. He then travels 16.5 km in two hours at a different constant speed and reaches a ranch tower. What is the average speed of the hiker for the entire trip? 16.5 5.10 km 2 hr 1 hr = 11.4 km 1 hr 3. A tortoise and a hare engage in a race. A tortoise can run with a speed of 0.15 m/s. A hare can run 25 times as fast as the tortoise. In the race, they start at the same time; however, the hare being very proud of his much higher speed stops for a nap for 5.0 minutes. The tortoise wins the race by 35 cm. (a) What is the length of the race? (b) How long does the race take? t tortoise = L v = L 0.15 m / s 4. A car starts at rest and accelerates with an acceleration of 4.51 m/s 2 . After the car travels a distance of 355 m, it slows down with an acceleration of -2.34 m/s 2 until its speed reaches 25.4 m/s. What is the total displacement of the car?
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