Resolving Forces: Acceleration & Speed of 4kg Block on Inclined Plane

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SUMMARY

The discussion focuses on calculating the acceleration and speed of a 4 kg block released from rest on a frictionless inclined plane at a 30-degree angle. The solution involves applying Newton's second law (F = ma) to determine the component of gravitational force acting down the slope, resulting in an acceleration of approximately 5.3 m/s². Subsequently, using the equation of motion v² = u² + 2as, the speed of the block after moving 3 meters is calculated to be approximately 7.75 m/s.

PREREQUISITES
  • Understanding of Newton's second law (F = ma)
  • Knowledge of basic kinematics equations
  • Familiarity with inclined plane physics
  • Ability to perform vector decomposition of forces
NEXT STEPS
  • Study the derivation of equations of motion in physics
  • Explore the effects of friction on inclined planes
  • Learn about gravitational force components on slopes
  • Investigate real-world applications of inclined plane mechanics
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Students studying physics, educators teaching mechanics, and anyone interested in understanding the dynamics of objects on inclined planes.

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Homework Statement



A block of wood of mass 4 kg is released from rest on a plane inclined at 30 degrees to the horizontal. Assuming that the surface can be modeled as smooth (no friction) calculate the acceleration of the block, and its speed after it has moved 3m

Homework Equations


equations of motion


The Attempt at a Solution



http://img174.imageshack.us/img174/2632/36018360et2.jpg
 
Last edited by a moderator:
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Apply F = ma down the slope by calculating the component of the weight down the slope to find the acceleration. Then use v^2 = u^2 + 2as to find the velocity v after s = 3 metres. Hope this helps.
 

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