6:19 1 Back Homework_3.pdf Q ? SCI 2233 Homework 3 * All answers must show work to receive full credit 1. Consider two blocks that are attached by a string. Block 1 (mass of 2 kg) lays on a flat plane. Block 2 (mass of 3 kg) hangs freely off the edge of the plane. In the absence of friction, Block 2 would fall and the string would pull Block 1 towards the edge. Find the static coefficient of friction needed to keep Block 1 at its starting position. = 2. Consider a block (mass 12 kg) at rest on a flat plane. A static coefficient of friction (us = 0.3) exists between the block and the ground. If a force of 50 N is applied to the block find: (a) The acceleration of the block. (b) The velocity of the block after 3 seconds. (c) The displacement of the block from its starting location after 3 seconds. 3. A block off mass (2 kg) is placed on a metal spring with spring stiffness (80 N/m). (a) How far is the spring compressed? (b) Imagine that the spring was compressed by twice the distance as in part (a), then released. What is the acceleration of the block after the spring is released? 4. Two blocks made from different material lay side by side on a flat plane. Block 1 (5 kg) has a kinetic coefficient of friction (uk = 0.6). Block 2 (2 kg) has no friction with the ground. Both are given an initial velocity of 10 m/s. Find the distance between the blocks after 5 seconds. (a) What is the magnitude of the tension force in the string? (b) What is the magntiude of the acceleration of the system? a 5. A set of three identical blocks is hung from a ceiling by series of strings (there is a string between each block and one connected to the ceiling). Each block has a mass of (3 kg). Find the tension force in each string (It will be different for each string). 4 Dashboard Calendar To Do Notifications Inbox
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