A ball is thrown upwards with a speed of 20 m/s. How long will it take to reach

Practice Questions

Q1
A ball is thrown upwards with a speed of 20 m/s. How long will it take to reach the maximum height?
  1. 2 s
  2. 3 s
  3. 4 s
  4. 5 s

Questions & Step-by-Step Solutions

A ball is thrown upwards with a speed of 20 m/s. How long will it take to reach the maximum height?
  • Step 1: Understand that when a ball is thrown upwards, it will eventually stop rising and reach its maximum height before falling back down.
  • Step 2: Know that the initial speed (u) of the ball is 20 m/s.
  • Step 3: Recognize that the acceleration due to gravity (g) is approximately 9.8 m/s², and it acts downwards.
  • Step 4: To find the time (t) it takes to reach the maximum height, use the formula: t = u / g.
  • Step 5: Substitute the values into the formula: t = 20 m/s / 9.8 m/s².
  • Step 6: Calculate the result: t ≈ 2.04 seconds.
  • Kinematics – The study of motion, specifically how objects move under the influence of forces.
  • Projectile Motion – The motion of an object thrown into the air, subject to gravitational acceleration.
  • Time of Flight – The time taken for an object to reach its maximum height when thrown vertically.
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