A ball is thrown upwards with a speed of 15 m/s. How long will it take to reach

Practice Questions

Q1
A ball is thrown upwards with a speed of 15 m/s. How long will it take to reach the highest point? (Take g = 10 m/s²) (2023)
  1. 1.5 s
  2. 2 s
  3. 3 s
  4. 4 s

Questions & Step-by-Step Solutions

A ball is thrown upwards with a speed of 15 m/s. How long will it take to reach the highest point? (Take g = 10 m/s²) (2023)
  • Step 1: Understand that when a ball is thrown upwards, it will eventually stop rising and reach a highest point before falling back down.
  • Step 2: Know that the initial speed (u) of the ball is 15 m/s.
  • Step 3: Recognize that the acceleration due to gravity (g) is 10 m/s², which acts downwards.
  • Step 4: Use the formula to find the time (t) to reach the highest point: t = u / g.
  • Step 5: Substitute the values into the formula: t = 15 m/s / 10 m/s².
  • Step 6: Calculate the time: t = 1.5 seconds.
  • Projectile Motion – The question tests the understanding of the motion of a projectile under the influence of gravity, specifically how to calculate the time taken to reach the highest point.
  • Kinematic Equations – It involves the use of the basic kinematic equation relating initial velocity, acceleration due to gravity, and time.
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