
College Physics
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Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Transcribed Image Text:17. If you are sliding a box along the floor, why does it takes more force to start sliding the box
than it does to continue pushing it once the box has started moving?
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- 13. An object sits at rest on a ramp. As the angle of inclination of the ramp increases, the object suddenly begins to slide. Which of the following explanations best accounts for the object's movement? a. The coefficient of static friction has decreased sufficiently. b. The force of gravity acting on the object has increased sufficiently. c. The component of gravity along the ramp has increased sufficiently. d. The friction has decreased sufficiently while the normal force has remained unchanged. e. The normal force has increased sufficiently.arrow_forward60. An 8.0-kilogram block and a 2.0-kilogram block rest on a horizontal frictionless surface. When horizontal force F is applied to the 8.0-kilogram block, it accelerates at 5.0 meters per second east. If the same force was applied to the 2.0-kilogram block, the magnitude of the block's acceleration would be (1) 1.3 m/s2 (2) 2.5 m/s2 (3) 10. m/s2 (4) 20. m/s SHOW WORK, CIRCLE ANSWER, WRITE NEATarrow_forward38) Help me to solve this question, no handwritten, only typingarrow_forward
- 10. To meet a U.S. Postal Service requirement, employees' footwear must have a coefficient of static friction of 0.5 or more on a specified tile surface. A typical athletic shoe has a coefficient of static friction of 0.800. In an emergency, what is the minimum time interval in which a person starting from rest can move 3.00 m on the tile surface if she is wearing (a) footwear meeting the Postal Service minimum and (b) a typical athletic shoe? Answers: a) 1.11 s b) 0.875 sarrow_forwardTwo muscles in the back of the leg pull upward on the Achilles tendon. Find the magnitude and direction of the total force on the Achilles tendon. What movement is caused by this force? F₂(200 N) F, (200 N) 20% 20%arrow_forward
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