4. A purple penguin is being dragged along the ground by a rope which makes a 25° angle with the horizontal. If the tension in the rope is 8N, the weight of the penguin is 30N, and the coefficient of kinetic friction between penguin and ground is μK = 0.2. Find the acceleration of the penguin, and say whether the penguin is speeding up, slowing down, or moving at constant speed. L Penguin y 25°

4. A purple penguin is being dragged along the ground by a rope which makes a 25° angle with the horizontal. If the tension in the rope is 8N, the weight of the penguin is 30N, and the coefficient of kinetic friction between penguin and ground is μK = 0.2. Find the acceleration of the penguin, and say whether the penguin is speeding up, slowing down, or moving at constant speed. L Penguin y 25°

Name: 4. A purple penguin is being dragged along the ground by a rope which
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Description: 4. A purple penguin is being dragged along the ground by a rope which makes a 25° anglewith the horizontal. If the tension in the rope is 8N, the weight of the penguin is 30N, and thecoefficient of kinetic friction between penguin and ground is μK =

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter4: The Laws Of Motion

Section: Chapter Questions

Problem 44P: A crate of mass 45.0 kg is being transported on the flatbed of a pickup truck. The coefficient of...

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1. An object of mass 45 kg is drawn upward an inclined plane by a force of 600N. The coefficient of friction between the object and the plane is 0.56. angle of inclination of the plane is 30o to the horizontal a). what is the acceleration of the object? b). if at the top of the plane, the object slide down freely on the plane under its own weight, with i. what acceleration and ii. velocity does it strike the ground? c) what would be the acceleration if the plane was frictionless?
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Two blocks each of mass m are fastened to the top of an elevator as in Figure P4.56. The elevator has an upward acceleration a. The strings have negligible mass, (a) Find the tensions T1 and T2 in the upper and lower strings in terms of m, a, and g. (b) Compare the two tensions and determine which string would break first if a is made sufficiently large. (c) What are the tensions if the cable supporting the elevator breaks? Figure P4.56