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Unformatted text preview: fryer (vdf96) Assignment 5 Newtons Laws graves (6) 1 This printout should have 16 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. 001 (part 1 of 2) 10.0 points The sum of two forces, one having a magni tude of 7 N acting due west and other having a magnitude of 9 N acting due north is 1. ( 2 N , 2 N) 2. (9 N , 7 N) 3. ( 7 N , 9 N) correct 4. (9 N , 7 N) 5. ( 7 N , 9 N) 6. ( 9 N , 7 N) 7. (7 N , 9 N) 8. ( 9 N , 7 N) 9. (7 N , 9 N) 10. (16 N , 16 N) Explanation: 7 N 9 N F 002 (part 2 of 2) 10.0 points What is the magnitude of that force? Correct answer: 11 . 4018 N. Explanation: Applying the Pythagorean Theorem, F = radicalBig ( 7 N) 2 + (9 N) 2 = 11 . 4018 N . 003 10.0 points When you drop a rubber ball on the floor it bounces almost to its original height. What causes the ball to bounce? 1. The ball attempts to return to its original position. 2. Air forced out upon contact causes a tem porary vacuum which sucks the ball up. 3. The force of the floor on the ball causes it to bounce upward. correct 4. The floor pushes up on the ball harder then the ball pushes down on the floor. Explanation: When the ball strikes the floor, the floor simultaneously strikes the ball. The strike of the floor on the ball causes it to bounce upward. 004 (part 1 of 2) 10.0 points A fastmoving VW Beetle traveling at 51 mph hit a mosquito hovering at rest above the road. Which bug experienced the largest force? 1. Unable to determine 2. They experienced the same magnitude of force. correct 3. the VW 4. the insect Explanation: By Newtons third law, the forces had the same magnitude, but were in opposite direc tions. 005 (part 2 of 2) 10.0 points Which bug experienced the greatest accelera tion? fryer (vdf96) Assignment 5 Newtons Laws graves (6) 2 1. Their acceleration is same. 2. Unable to determine. 3. the insect correct 4. the VW Explanation: Since the mosquito has a much smaller mass, it experiences a much larger acceler ation. 006 (part 1 of 3) 10.0 points The following 3 questions refer to the colli sions between a car and a truck whose weight is much heavier than the car ( M m ). For each description of a collision below, choose the one answer from the possibilities that best describes the size (or magnitude) of the forces between the car and the truck....
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 Fall '10
 Graves
 Physics, Force

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