If a car accelerates from rest at a rate of 2 m/s², what will be its speed after

Practice Questions

Q1
If a car accelerates from rest at a rate of 2 m/s², what will be its speed after 5 seconds? (2023)
  1. 5 m/s
  2. 10 m/s
  3. 15 m/s
  4. 20 m/s

Questions & Step-by-Step Solutions

If a car accelerates from rest at a rate of 2 m/s², what will be its speed after 5 seconds? (2023)
  • Step 1: Identify the initial speed of the car. Since the car starts from rest, the initial speed is 0 m/s.
  • Step 2: Identify the acceleration of the car. The car accelerates at a rate of 2 m/s².
  • Step 3: Identify the time duration for which the car accelerates. In this case, it is 5 seconds.
  • Step 4: Use the formula for speed: Speed = Initial speed + (Acceleration × Time).
  • Step 5: Substitute the values into the formula: Speed = 0 m/s + (2 m/s² × 5 s).
  • Step 6: Calculate the acceleration part: 2 m/s² × 5 s = 10 m/s.
  • Step 7: Add the initial speed to the calculated acceleration: 0 m/s + 10 m/s = 10 m/s.
  • Step 8: Conclude that the speed of the car after 5 seconds is 10 m/s.
  • Kinematics – The study of motion, specifically how speed, acceleration, and time relate to each other.
  • Acceleration – The rate of change of velocity of an object, measured in meters per second squared (m/s²).
  • Initial Speed – The speed of the object at the start of the observation, which is zero in this case since the car starts from rest.
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