Question 1 of 19 2 Points Questions #1-3: Real-life solids like metal, stone, and glass all act like extremely stiff springs: when they are subject to an imposed force, they stretch or compress a tiny amount, exerting a strong restoring force in response. 1. Suppose that the long vertical steel cables that suspend a particular elevator collectively behave like an ideal spring with a spring-constant of 3.6x105 N/m. Assume that there are no brakes or other forces acting on the elevator cab, and define the elevator cab to be hanging at its equilibrium position when nobody is inside. How many kilograms of people must enter the elevator for it to drop by 3.7 centimeters from its equilibrium height? kg Your Laulima form contains a randomized value for the elevator's displacement. . Calculate and enter your final answer to at least 2 significant figures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Laulima to judge your answer to be wrong. . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. . Partial credit is NOT possible. Mark for Review What's This? Question 2 of 19 2 Points Questions #1-3: Real-life solids like metal, stone, and glass all act like extremely stiff springs: when they are subject to an imposed force, they stretch or compress a tiny amount, exerting a strong restoring force in response. 2. A particular stone pedestal for a marble statue behaves like an ideal spring with a spring-constant of 6.0x108 N/m. When a 349-kilogram statue is placed at rest on top of the pedestal, by what distance, in micrometers, does the pedestal compress? um Your Laulima form contains a randomized value for the statue's mass. . Calculate and enter your final answer to at least 2 significant figures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Laulima to judge your answer to be wrong. . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. . Partial credit is NOT possible. Mark for Review What's This?Question 3 of 19 0.5 Points Questions #1-3: Real-life solids like metal, stone, and glass all act like extremely stiff springs: when they are subject to an imposed force, they stretch or compress a tiny amount, exerting a strong restoring force in response. 3. Which one of the following common objects has roughly the same size (same order-of-magnitude) as the distance in your previous answer? A. Diameter of an atom B. The width of a rice grain C. Diameter of a ping-pong ball D. Length of a bacterium E. Diameter of an atomic nucleus Reset Selection Mark for Review What's This? Question 4 of 19 0.5 Points Questions #4-9: Suppose that you have a heavy block m that can slide frictionlessly down a slippery ramp whose angle of inclination a (alpha) can be varied. For an object on a frictionless incline, it can be shown that the magnitude of acceleration (in the downhill direction) is: a = g sin(a) 4. In which of the following two cases will the block will experience a greater magnitude of acceleration in the downhill direction? A. shallower ramp B. steeper ramp Reset Selection Mark for Review What's This?Question 5 of 19 1 Points Questions #4-9: Suppose that you have a heavy block m that can slide frictionlessly down a slippery ramp whose angle of inclination a (alpha) can be varied. For an object on a frictionless incline, it can be shown that the magnitude of acceleration (in the downhill direction) is: a = g sin(a) 5. What is the magnitude of the downhill acceleration if a = 0 degrees? A. O B. 0.5 8 O c. 8 D. 28 E. infinite Reset Selection Mark for Review What's This? Question 6 of 19 1 Points Questions #4-9: Suppose that you have a heavy block m that can slide frictionlessly down a slippery ramp whose angle of inclination a (alpha) can be varied. For an object on a frictionless incline, it can be shown that the magnitude of acceleration (in the downhill direction) is: a = g sin(a) 6. What is the magnitude of the downhill acceleration if a = 90 degrees? O A. O B. 0.5 8 O C. 8 O D. 28 O E. infiniteQuestion 9 of 19 1 Points Questions #4-9: Suppose that you have a heavy block m that can slide frictionlessly down a slippery ramp whose angle of inclination a (alpha) can be varied. For an object on a frictionless incline, it can be shown that the magnitude of normal force from the ramp is: FN = mg cos(a) 9. What is the magnitude of the normal force if a = 90 degrees? OA. O B. 0.5 mg c. mg D. 2 mg E. infinite Reset Selection Mark for Review What's This? Question 10 of 19 0.5 Points Questions #10-12: For an object m sitting continuously at rest on an incline of angle a (alpha) with coefficient of static friction /s, it can be shown that the minimum value of Us needed to prevent the object from sliding is: Hs = tan(a) 10. Which of the following two cases requires a larger coefficient of static friction to keep the block at rest? A. shallower ramp B. steeper ramp Reset SelectionQuestion 7 of 19 0.5 Points Questions #4-9: Suppose that you have a heavy block m that can slide frictionlessly down a slippery ramp whose angle of inclination a (alpha) can be varied. For an object on a frictionless incline, it can be shown that the magnitude of normal force from the ramp is: FN = mg cos(a) 7. In which of the following two cases will the block will experience a stronger normal force from the ramp? A. shallower ramp B. steeper ramp Reset Selection Mark for Review What's This? Question 8 of 19 1 Points Questions #4-9: Suppose that you have a heavy block m that can slide frictionlessly down a slippery ramp whose angle of inclination a (alpha) can be varied. For an object on a frictionless incline, it can be shown that the magnitude of normal force from the ramp is: FN = mg cos(a) 8. What is the magnitude of the normal force if a = 0 degrees? A. O B. 0.5 mg O c. mg O D. 2 mg E. infinite Reset Selection Mark for Review What's This?Question 11 of19 1 Points Questions #10-12: For an object In sitting continuously at reston an incline of angle :1 (alpha) with coefcient of static friction p5, it can be shown that the minimum value of p5 needed to prevent the object from sliding is: #5 = tanm) 11. What is the minimum coefficient of static friction needed if [I = 0 degrees? C) A. 0 Q B. 0.5 O C. 1 O D. 2 O E. infinite Reset Selection C] Mark for Review What's This? Question 12 of19 1 Points Questions #10-12: For an object in sitting continuously at reston an incline of angle G (alpha) with coefcient of static friction us, it can be shown that the minimum value of us needed to prevent the object from sliding is: i\": = tanm) 12. What is the minimum coefficient of static friction needed if C! = 90 degrees? 0 A. 0 Q B. 0.5 O c. i O D, Z O E. infinite Question 13 of 19 1 Points Click to see additional instructions Questions #13-19: A large appliance with mass 25.0 kg sits at rest on a level kitchen counter. The coefficients of friction between the appliance and counter are /s = 0.800 and /k = 0.400. 13. If you push horizontally on the appliance with 100. N, what is the magnitude of the friction force that arises, in newtons? newtons . Calculate and enter your final answer to at least 3 significant figures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Laulima to judge your answer to be wrong. . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. . Partial credit is NOT possible. Mark for Review What's This? Question 14 of 19 0.5 Points Click to see additional instructions Questions #13-19: A large appliance with mass 25.0 kg sits at rest on a level kitchen counter. The coefficients of friction between the appliance and counter are /s = 0.800 and /k = 0.400. 14. If you push horizontally on the appliance with 100. N, what will be the resulting magnitude of the appliance's acceleration, in m/s? m / s2 . Calculate and enter your final answer to at least 3 significant figures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Laulima to judge your answer to be wrong. . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. . Partial credit is NOT possible. Mark for Review What's This?Question 15 of 19 1 Points Click to see additional instructions Questions #13-19: A large appliance with mass 25.0 kg sits at rest on a level kitchen counter. The coefficients of friction between the appliance and counter are /s = 0.800 and Mk = 0.400. 15. If you push horizontally on the appliance with 150. N, what is the magnitude of the friction force that arises, in newtons? newtons . Calculate and enter your final answer to at least 3 significant figures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Laulima to judge your answer to be wrong. . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. . Partial credit is NOT possible. Mark for Review What's This? Question 16 of 19 0.5 Points Click to see additional instructions Questions #13-19: A large appliance with mass 25.0 kg sits at rest on a level kitchen counter. The coefficients of friction between the appliance and counter are As = 0.800 and MK = 0.400. 16. If you push horizontally on the appliance with 150. N, what will be the resulting magnitude of the appliance's acceleration, in m/s? m/s2 . Calculate and enter your final answer to at least 3 significant figures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Laulima to judge your answer to be wrong. . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. . Partial credit is NOT possible. Mark for Review What's This?Question 17 of 19 1 Points Click to see additional instructions Questions #13-19: A large appliance with mass 25.0 kg sits at rest on a level kitchen counter. The coefficients of friction between the appliance and counter are /s = 0.800 and Mk = 0.400. 17. If you push horizontally on the appliance with 240. N, what is the magnitude of the friction force that arises, in newtons? newtons . Calculate and enter your final answer to at least 3 significant figures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Laulima to judge your answer to be wrong. . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. . Partial credit is NOT possible. Mark for Review What's This? Question 18 of 19 2 Points Click to see additional instructions Questions #13-19: A large appliance with mass 25.0 kg sits at rest on a level kitchen counter. The coefficients of friction between the appliance and counter are Is = 0.800 and MK = 0.400. 18. If you push horizontally on the appliance with 240. N, what will be the resulting magnitude of the appliance's acceleration, in m/s? m/$2 . Calculate and enter your final answer to at least 3 significant figures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Laulima to judge your answer to be wrong. . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. . Partial credit is NOT possible. Mark for Review What's This?Question 19 of 19 2 Points Click to see additional instructions Questions #13-19: A large appliance with mass 25.0 kg sits at rest on a level kitchen counter. The coefficients of friction between the appliance and counter are /s = 0.800 and Mk = 0.400. 19. What is the strength of the horizontal force, in newtons, that you should apply to the appliance in order to keep it sliding at a constant speed? newtons . Calculate and enter your final answer to at least 3 significant figures. There is no penalty for including too many significant figures, but rounding to too few sig figs may cause Laulima to judge your answer to be wrong. . Do NOT enter units with your answer; enter only a numerical response. Laulima will count non-numerical answers as incorrect. . Partial credit is NOT possible