A 2 kg block is sliding down a frictionless incline of 30 degrees. What is the a

Practice Questions

Q1
A 2 kg block is sliding down a frictionless incline of 30 degrees. What is the acceleration of the block?
  1. 4.9 m/s²
  2. 9.8 m/s²
  3. 3.9 m/s²
  4. 1.96 m/s²

Questions & Step-by-Step Solutions

A 2 kg block is sliding down a frictionless incline of 30 degrees. What is the acceleration of the block?
  • Step 1: Identify the mass of the block, which is 2 kg. This information is not needed for calculating acceleration but is part of the problem.
  • Step 2: Identify the angle of the incline, which is 30 degrees.
  • Step 3: Recall the acceleration due to gravity, g, which is approximately 9.8 m/s².
  • Step 4: Use the formula for acceleration down an incline: a = g * sin(θ).
  • Step 5: Calculate sin(30°). The sine of 30 degrees is 0.5.
  • Step 6: Substitute the values into the formula: a = 9.8 m/s² * 0.5.
  • Step 7: Perform the multiplication: 9.8 * 0.5 = 4.9 m/s².
  • Step 8: Conclude that the acceleration of the block is 4.9 m/s².
  • Inclined Plane Dynamics – Understanding how gravity affects an object sliding down an incline, specifically calculating acceleration using the angle of the incline.
  • Trigonometric Functions – Applying sine function to resolve gravitational force components along the incline.
  • Newton's Second Law – Using the relationship between force, mass, and acceleration to determine the motion of the block.
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