Test 1 Chapters 1-2-Fall 17 Answer questions on separate paper. L Diagrams shoul

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Test 1 Chapters 1-2-Fall 17 Answer questions on separate paper. L Diagrams should bu kaper Label questions clearty Draw and label clear diagrams large enough to see parts clearly 0. (4 pt bonus) Assigned homework 1. (4 pts) An automobile tire is expected to last 50,000 miles. Estimate how many revolutions the tire will make in its lifetime. 2. (2 pts) The number 0.000460 has how 3. (2 pts) What is the only unit of measurement that is based on a physical object? with an ordinary push lawnmower many significant figures? 4. (4 pts) Estimate how long it would take to mow Paul Brown Stadium (football field) 5. (6 pts) Solve for the remaining variable. b) E-½kx2 E-100 J; x-2m e) R-pl/A R-150 ohm; -.25 ohm-m: L-300 m 6. (8 pts) Convert the following: a) 128 mile to km d) 16 furlong/hour to mileday. b) 28 kmh to m/s e) 3.2to in2 7. (5 pts) A car doubles its speed while passing a second car. Its original speed is 25 mplh (36.7 ft/s) and it takes 4.5 s to double its speed. A) Draw a diagram showing initial and final speeds and distance. B) What is the car's final speed? C) What is the car's average acceleration? D) What distance will it travel during the acceleration? 8. (5 pts) The driver of a car can experience and acceleration of 1 "g" while accelerating frm an initial speed of 7 m/s. A) Howlong will it take to travel 200 m with this acceleration? B) What is his average speed during this time? 9. (5 pts) A motorist drives East for 60 minutes at 50 mi/hr, then stops 1 hour for lunch. She continues East 180 miles for 3 hours. (a) What is her total displacement? (b) What is her average speed? 10. (5 pts) A train is made up of 116 cars and 4 engines, each 15 m in length. The train is moving at 5 m/s when a car traveling in the opposite direction on a parallel highway is located at the front of the train. If the car is moving at 20 m/s, how long will it take the car to move to past the train? Do not worry about the length of the car. Draw a diagram. 11. (5 pts) A cannon sitting on a flat plain fires a 10 kg ball vertically at a velocity of 300 m/s. a) How high will the ball go? b) How long will it be in the air? e) What is its velocity after 10 s? d) What is its height and velocity after 15 s? e) At what times will the ball be 500 m above the ground? Phy 151 Test 1 Summer 15

Explanation / Answer

1) given,

since 1 rev = circumference = pi*d = 7.854

total distance = 50000 * 5280 ft = 264 million

264 million / 7.854 = 33613524 revolutions

2) 3 significant figures

3) Kilograms (kg)

4) Dimensions are not given....

5) a) R = 242/100 = 5.76

b) k = 200/4 = 50

c) A = 0.25 x 300/150 = 0.5

According to Chegg guidelines I can answer these many sub parts in a question, so please post other parts separately. Please rate my answer if you find it helpful, good luck...

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