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An object moves in a straight line with a constant acceleration of 3 m/s². If it

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Question: An object moves in a straight line with a constant acceleration of 3 m/s². If its initial velocity is 5 m/s, what will be its velocity after 4 seconds?

Options:

  1. 5 m/s
  2. 11 m/s
  3. 17 m/s
  4. 23 m/s

Correct Answer: 17 m/s

Solution: 

Using the formula v = v_i + at, where v_i = 5 m/s, a = 3 m/s², and t = 4 s, we get v = 5 + (3 * 4) = 17 m/s.

An object moves in a straight line with a constant acceleration of 3 m/s². If it

Practice Questions

Q1
An object moves in a straight line with a constant acceleration of 3 m/s². If its initial velocity is 5 m/s, what will be its velocity after 4 seconds?
  1. 5 m/s
  2. 11 m/s
  3. 17 m/s
  4. 23 m/s

Questions & Step-by-Step Solutions

An object moves in a straight line with a constant acceleration of 3 m/s². If its initial velocity is 5 m/s, what will be its velocity after 4 seconds?
  • Step 1: Identify the initial velocity (v_i). In this case, v_i = 5 m/s.
  • Step 2: Identify the acceleration (a). Here, a = 3 m/s².
  • Step 3: Identify the time (t). In this problem, t = 4 seconds.
  • Step 4: Use the formula for final velocity: v = v_i + at.
  • Step 5: Substitute the values into the formula: v = 5 + (3 * 4).
  • Step 6: Calculate the product of acceleration and time: 3 * 4 = 12.
  • Step 7: Add the initial velocity to the result from Step 6: 5 + 12 = 17.
  • Step 8: The final velocity after 4 seconds is 17 m/s.
  • Kinematics – The study of motion, specifically how velocity changes over time under constant acceleration.
  • Equations of Motion – Using the formula v = v_i + at to calculate final velocity based on initial velocity, acceleration, and time.
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