A body moves in a straight line with an initial velocity of 10 m/s and accelerat

Practice Questions

Q1
A body moves in a straight line with an initial velocity of 10 m/s and accelerates at 2 m/s². What will be its velocity after 5 seconds?
  1. 20 m/s
  2. 25 m/s
  3. 30 m/s
  4. 35 m/s

Questions & Step-by-Step Solutions

A body moves in a straight line with an initial velocity of 10 m/s and accelerates at 2 m/s². What will be its velocity after 5 seconds?
Correct Answer: 20 m/s
  • Step 1: Identify the initial velocity (u). In this case, u = 10 m/s.
  • Step 2: Identify the acceleration (a). Here, a = 2 m/s².
  • Step 3: Identify the time (t) for which the body is accelerating. In this case, t = 5 seconds.
  • Step 4: Use the formula for final velocity: v = u + at.
  • Step 5: Substitute the values into the formula: v = 10 + (2 * 5).
  • Step 6: Calculate the acceleration part: 2 * 5 = 10.
  • Step 7: Add the initial velocity to the result: 10 + 10 = 20.
  • Step 8: The final velocity after 5 seconds is 20 m/s.
  • Kinematics – The study of motion, specifically how velocity, acceleration, and time relate to each other.
  • Equations of Motion – Using the formula v = u + at to calculate final velocity based on initial velocity, acceleration, and time.
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