College Physics
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Newton's First Law of Motion
If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!
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4, 85. You are helping a friend move, and you need to load a 2.65 X 102 kg box of books. You slide the box ramp, which has an incline of 30.0° and a coefficient of static friction of 0.45. You apply the force on the box at an angle of 39.0° with respect to the ramp. (2.4) K/U TI A S). up a to (a) Calculate the minimum force needed to slide the box up the ramp. (b) Now you want to stop halfway up the ramp. What coefficient of static friction must exist between the box and the ramp for the box to stay in place? ger with a mass of 56 kg. (3.1) KU TI A 87. Suppose Earth turned with a greater rotation speed. Determine what the period of rotation, in hours, must 8888888 EL-531XT ADVANCED D.A.L. OFF ON/C HOME CA MÓDE 2nd F STAT VAR INS ALPHA SET UP DEL arc hypNOT sin'AND cos OR tan'XOR DRG►XNOR hyp sin cos tan B x-l c 3 D 10* E ex X2 X3 log d/c DEG Exp ab D°M'S RCL STO RANDOM -re sy -xy oy (x,y) 8. 9. n! nCr sx nPr ox HEX c BIN r % Exy 3
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Transcribed Image Text:4, 85. You are helping a friend move, and you need to load a 2.65 X 102 kg box of books. You slide the box ramp, which has an incline of 30.0° and a coefficient of static friction of 0.45. You apply the force on the box at an angle of 39.0° with respect to the ramp. (2.4) K/U TI A S). up a to (a) Calculate the minimum force needed to slide the box up the ramp. (b) Now you want to stop halfway up the ramp. What coefficient of static friction must exist between the box and the ramp for the box to stay in place? ger with a mass of 56 kg. (3.1) KU TI A 87. Suppose Earth turned with a greater rotation speed. Determine what the period of rotation, in hours, must 8888888 EL-531XT ADVANCED D.A.L. OFF ON/C HOME CA MÓDE 2nd F STAT VAR INS ALPHA SET UP DEL arc hypNOT sin'AND cos OR tan'XOR DRG►XNOR hyp sin cos tan B x-l c 3 D 10* E ex X2 X3 log d/c DEG Exp ab D°M'S RCL STO RANDOM -re sy -xy oy (x,y) 8. 9. n! nCr sx nPr ox HEX c BIN r % Exy 3
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