If a car accelerates uniformly from rest to a speed of 25 m/s in 10 seconds, wha

Practice Questions

Q1
If a car accelerates uniformly from rest to a speed of 25 m/s in 10 seconds, what is the distance covered during this time? (2023)
  1. 125 m
  2. 150 m
  3. 200 m
  4. 250 m

Questions & Step-by-Step Solutions

If a car accelerates uniformly from rest to a speed of 25 m/s in 10 seconds, what is the distance covered during this time? (2023)
  • Step 1: Identify the initial speed (u). Since the car starts from rest, u = 0 m/s.
  • Step 2: Identify the final speed (v). The car accelerates to a speed of 25 m/s.
  • Step 3: Identify the time (t) taken to reach the final speed. The time is given as 10 seconds.
  • Step 4: Calculate the acceleration (a) using the formula a = (v - u) / t. Here, a = (25 m/s - 0 m/s) / 10 s = 2.5 m/s².
  • Step 5: Use the formula for distance (s) covered during acceleration: s = ut + (1/2)at².
  • Step 6: Substitute the values into the distance formula. Since u = 0, the formula simplifies to s = (1/2)(2.5 m/s²)(10 s)².
  • Step 7: Calculate (10 s)², which is 100 s².
  • Step 8: Multiply (1/2) by 2.5 m/s² and 100 s²: (1/2)(2.5)(100) = 125 m.
  • Step 9: Conclude that the distance covered during the 10 seconds is 125 meters.
  • Uniform Acceleration – Understanding the equations of motion for an object accelerating uniformly from rest.
  • Kinematic Equations – Application of the kinematic equation to calculate distance, given initial velocity, acceleration, and time.
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