You are lowering two boxes, one on top of the other, down the ramp shown in the figure (Figure 1) by pulling on a rope parallel to the surface of the ramp. Both boxes move together at a constant speed of 10.0 cm/s. The coefficient of kinetic friction between the ramp and the lower box is 0.470, and the coefficient of static friction between the two boxes is 0.781. Figure 32.0 kg 48.0 kg 4.75 m < 1 of 1 2.50 m What force do you need to exert to accomplish this? ΜΕ ΑΣΦ T= Submit Request Answer Part B ? What is the magnitude of the friction force on the upper box? ΜΕ ΑΣΦ f= ? N N Part C What is the direction of the friction force on the upper box? O up the ramp O down the ramp

You are lowering two boxes, one on top of the other, down the ramp shown in the figure (Figure 1) by pulling on a rope parallel to the surface of the ramp. Both boxes move together at a constant speed of 10.0 cm/s. The coefficient of kinetic friction between the ramp and the lower box is 0.470, and the coefficient of static friction between the two boxes is 0.781. Figure 32.0 kg 48.0 kg 4.75 m < 1 of 1 2.50 m What force do you need to exert to accomplish this? ΜΕ ΑΣΦ T= Submit Request Answer Part B ? What is the magnitude of the friction force on the upper box? ΜΕ ΑΣΦ f= ? N N Part C What is the direction of the friction force on the upper box? O up the ramp O down the ramp

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter5: Newton's Law Of Motion

Section: Chapter Questions

Problem 23P: While sliding a couch across a floor, Andrea and Jennifer exert forces FA and FJ on the couch....

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While sliding a couch across a floor, Andrea and Jennifer exert forces FA and FJ on the couch. Andrea’s force is due north with a magnitude of 130.0 N and Jennifer’s force is 32 east of north with a magnitude of 180.0 N. (a) Find the net force in component form. (b) Find the magnitude and direction of the net force. (c) If Andrea and Jennifer’s housemates, David and Stephanie, disagree with the move and want to prevent its relocation, with what combined forceFDS should they push so that the couch does not move?
Consider the baby being weighed in the following figure. (a) What is the mass of the infant and basket if a scale reading of 55 N is observed? (b) What is tension T1in the cord attaching the baby to the scale? (c) What is tension T2, In the cord attaching the scale to the ceiling, If the scale has a mass of 0.500 kg? (d) Sketch the situation, indicating the system of interest used to solve each part. The masses of the cords are negligible.
(a) What is the maximum frictional force in the knee joint of a person who supports 66.0 kg of her mass on that knee? (b) During strenuous exercise, it is possible to exert forces to the joints that are easily 10 times greater than the weight being supported. What is the maximum force of friction under such conditions? The frictional forces in joints are relatively small in all circumstances except when the joints deteriorate, such as from injury or arthritis. Increased frictional forces can cause further damage and pam.
A stubborn dog is being walked on a leash by its owner. At one point, the dog encounters an interesting scent at some spot on the ground and wants to explore It in detail, but the owner gets impatient and pulls on the leash with force along the leash. (a) What is the magnitude of the pulling force? (b) What angle does the leash make with the vertical?
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M Assume no friction M Hanging mass is 8 kg. Mass on table is 9 kg. What is the tension in the string connecting them? Answer to 2 sig figs.
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1. An orthodonist uses braces to apply forces that reposition and straighten teeth. In the figure below, the teeth on the left side need to be pushed down to line up with the teeth on the right. The braces apply equal tension forces, T1 and T2, of 20.0 N. Calculate the magnitude of the net force. |Fnet Enter to 3 significant figures O UP Down X ナ O Left 15⁰ 2. What is the direction of the net force in the previous problem? Right ✔N y 15° X
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