Khufra works at a spring factory and he was assigned to test a certain spring, whose constant is 50 N/m, attached to a 50-kg block in an incline (0=30°). With the spring initially at equilibrium position, the block was pulled 0.5 meters down the incline by a 30-N external force applied parallel to the path. If the coefficient of kinetic friction is 0.3, determine the: a) normal force (in Newtons) b) work done by the spring (in Joules) www

Khufra works at a spring factory and he was assigned to test a certain spring, whose constant is 50 N/m, attached to a 50-kg block in an incline (0=30°). With the spring initially at equilibrium position, the block was pulled 0.5 meters down the incline by a 30-N external force applied parallel to the path. If the coefficient of kinetic friction is 0.3, determine the: a) normal force (in Newtons) b) work done by the spring (in Joules) www

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter6: Energy Of A System

Section: Chapter Questions

Problem 20P

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Khufra works at a spring factory and he was assigned to test a certain spring, whose constant is 50 N/m, attached to a 50-kg block in an incline (8=30*). With the spring initially at equilibrium position, the block was pushed 0.5 meters up the incline by a 30-N external force applied parallel to the path. The coefficient of kinetic friction is 0.30. a) draw clearly the FBD of the block. b) How much is the normal force (in Newtons) on the block? c) How much work is done by the spring (in Joules) on the block?
Khufra works at a spring factory and he was assigned to test a certain spring, whose constant is 50 N/m, attached to a 50-kg block in an incline (θ=30°). With the spring initially at equilibrium position, the block was pulled 0.3 meters down the incline by a 50-N external force applied parallel to the path. The coefficient of kinetic friction is 0.30. a. draw clearly the FBD of the block. b. How much is the normal force (in Newtons) on the block? c. How much work is done by the spring (in Joules) on the block? d. How much work is done by the block (in Joules) on the spring? e. How much work is done by the applied pull on the block? f. How much work is done by friction?
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