Class 9 Exam  >  Class 9 Questions  >  If a ball is thrown vertically upwards with a... Start Learning for Free
If a ball is thrown vertically upwards with an initial velocity of 20 m/s, what will be its velocity after 2 seconds? (Assume g = 10 m/s²)
  • a)
    0 m/s
  • b)
    5 m/s
  • c)
    10 m/s
  • d)
    20 m/s
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
If a ball is thrown vertically upwards with an initial velocity of 20 ...
View all questions of this test
Most Upvoted Answer
If a ball is thrown vertically upwards with an initial velocity of 20 ...
Understanding the Problem
When a ball is thrown vertically upwards, it will eventually stop rising due to the force of gravity acting against its motion. The problem asks for the velocity of the ball after 2 seconds of being thrown upwards with an initial velocity of 20 m/s.
Key Concepts
- Initial Velocity (u): 20 m/s (upwards)
- Acceleration due to Gravity (g): -10 m/s² (downwards)
- Time (t): 2 seconds
Velocity Calculation
To find the velocity after 2 seconds, we can use the formula:
- Final Velocity (v) = u + (g * t)
Plugging in the values:
- u = 20 m/s
- g = -10 m/s²
- t = 2 s
Now, substituting these into the formula:
- v = 20 + (-10 * 2)
Calculating further:
- v = 20 - 20
- v = 0 m/s
Conclusion
After 2 seconds, the ball reaches its highest point and its velocity becomes 0 m/s. Therefore, the answer is:
- Correct Answer: a) 0 m/s
This means that at the 2-second mark, the ball has stopped moving upwards and is at the peak of its trajectory. It will then start to fall back down due to gravity.
Explore Courses for Class 9 exam

Top Courses for Class 9

Question Description
If a ball is thrown vertically upwards with an initial velocity of 20 m/s, what will be its velocity after 2 seconds? (Assume g = 10 m/s²)a)0 m/sb)5 m/sc)10 m/sd)20 m/sCorrect answer is option 'A'. Can you explain this answer? for Class 9 2025 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about If a ball is thrown vertically upwards with an initial velocity of 20 m/s, what will be its velocity after 2 seconds? (Assume g = 10 m/s²)a)0 m/sb)5 m/sc)10 m/sd)20 m/sCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 9 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If a ball is thrown vertically upwards with an initial velocity of 20 m/s, what will be its velocity after 2 seconds? (Assume g = 10 m/s²)a)0 m/sb)5 m/sc)10 m/sd)20 m/sCorrect answer is option 'A'. Can you explain this answer?.
Solutions for If a ball is thrown vertically upwards with an initial velocity of 20 m/s, what will be its velocity after 2 seconds? (Assume g = 10 m/s²)a)0 m/sb)5 m/sc)10 m/sd)20 m/sCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 9. Download more important topics, notes, lectures and mock test series for Class 9 Exam by signing up for free.
Here you can find the meaning of If a ball is thrown vertically upwards with an initial velocity of 20 m/s, what will be its velocity after 2 seconds? (Assume g = 10 m/s²)a)0 m/sb)5 m/sc)10 m/sd)20 m/sCorrect answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of If a ball is thrown vertically upwards with an initial velocity of 20 m/s, what will be its velocity after 2 seconds? (Assume g = 10 m/s²)a)0 m/sb)5 m/sc)10 m/sd)20 m/sCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for If a ball is thrown vertically upwards with an initial velocity of 20 m/s, what will be its velocity after 2 seconds? (Assume g = 10 m/s²)a)0 m/sb)5 m/sc)10 m/sd)20 m/sCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of If a ball is thrown vertically upwards with an initial velocity of 20 m/s, what will be its velocity after 2 seconds? (Assume g = 10 m/s²)a)0 m/sb)5 m/sc)10 m/sd)20 m/sCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice If a ball is thrown vertically upwards with an initial velocity of 20 m/s, what will be its velocity after 2 seconds? (Assume g = 10 m/s²)a)0 m/sb)5 m/sc)10 m/sd)20 m/sCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice Class 9 tests.
Explore Courses for Class 9 exam

Top Courses for Class 9

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev