21. Terminal velocity is the speed at which a falling object's drag balances its weight. A particular object weighs 250 N and its terminal velocity is 50. m/s. What is the force of drag on it when it is falling at 50. m/s? When it is fatting at 25 m/s? 2. Often a "win

21. Terminal velocity is the speed at which a falling object's drag balances its weight. A particular object weighs 250 N and its terminal velocity is 50. m/s. What is the force of drag on it when it is falling at 50. m/s? When it is fatting at 25 m/s? 2. Often a "win

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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4. The 1.0 kg physics book in ngure is connected by a string to a 500 g cof ch un the slope and relcased with a speed of 3 m/s. The cocefficient of fri a) What is the acceleration of the objects? b) Draw a force diagram for an individual item. Find the tension in the rop analyze?) ans 6.73 m s', 1.54 N 20
5. You are messing around with two textbooks and you place one on top of the other. You lift the lower book at one side to make a ramp. Draw a free-body diagram for the upper book while the books are still ying flat on the table.- a. There are two forces on the book. top b. Draw a free-body diagram for the upper book while the lower book is at an incline. There are three forces on the top book, now. What happens to the magnitude of the normal force exerted on the upper book once the lower book is lifted? Does it get bigger, smaller, or stay the same? с.
3. A block of mass m = 5.9 kg is pulled up a 0 = 21° incline as in the figure below with a force of magnitude F = 37 N. (Hint: remember to measure all angles from +x axis.) y a. Draw a free body diagram showing all the forces. NORml Fte F Mass = 5.9k 0-21° F-37N there b. Determine the x and y components of all the forces. X Components of Force f = 37 N Y comporents of Force F=0N X componnt of normal force=ON * Componis of weight=-5.9x 9.8x Sin 210=70. FJN Y Comperents of weight=5.9a 9.8 x Casal. - 53.98 Y Compenents of normal force=mglos H%53.98, c. Write equations summing all the x components and all the y components. F-mg Sm@= mxa 37-20.72= 5.9x a 2.7l6 = Comporunts) Normal force - mg les 0: 05 53.98-53.98-0o d. Find the acceleration of the block if the incline is frictionless. (Give the magnitude of the acceleration. Find the acceleration of the block if the coefficient of kinetic friction between the block and incline is 0.12. (Give the magnitude of the acceleration.) е. 3
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4. You are on a trip to the Moon and have no apparent weight. Youare handed two identically sized boxes, one filled with ping pong ballsand the other with steel free weights. How can you tell which is whichwithout opening them? (Hint: Use Newton’s Laws to explain yourideas)
4. Use the following five words (together with other words) in a single sentence that makes scientific sense: kinetic, static, normal, coefficient, accelerate.
QUESTION 7 When the net force acting on a body is zero, a. The body must be at rest b. The body must have a nonzero acceleration. C. The body must be moving with a constant velocity. d. The body must haved zero mass. O e. The body must not be moving in a straight line.