What is the dimensional formula for acceleration?

Practice Questions

Q1
What is the dimensional formula for acceleration?
  1. [M^0 L^1 T^-2]
  2. [M^0 L^0 T^-2]
  3. [M^1 L^1 T^-2]
  4. [M^1 L^0 T^-2]

Questions & Step-by-Step Solutions

What is the dimensional formula for acceleration?
  • Step 1: Understand what acceleration is. Acceleration is how quickly something changes its speed or velocity.
  • Step 2: Recall the formula for acceleration. Acceleration (a) is defined as the change in velocity (Δv) divided by the time (Δt) it takes for that change: a = Δv / Δt.
  • Step 3: Identify the dimensions of velocity. Velocity (v) is distance (L) divided by time (T), so its dimensional formula is [L^1 T^-1].
  • Step 4: Substitute the dimensional formula of velocity into the acceleration formula. Since acceleration is velocity divided by time, we have: [L^1 T^-1] / [T^1].
  • Step 5: Simplify the expression. When you divide [L^1 T^-1] by [T^1], you subtract the exponents of T: [L^1 T^(-1-1)] = [L^1 T^-2].
  • Step 6: Write the final dimensional formula for acceleration. Since there is no mass involved in the formula, the mass dimension is [M^0]. Therefore, the complete dimensional formula for acceleration is [M^0 L^1 T^-2].
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