A ball is projected vertically up with a velocity of 20 m/s. Its velocity when it reaches 15 m height is ______ m/s. (Take g = 10 m/s2)
Question
A ball is projected vertically up with a velocity of 20 m/s. Its velocity when it reaches 15 m height is ______ m/s. (Take g = 10 m/s2)
Solution
To solve this problem, we can use the equation of motion:
v² = u² - 2gh
where: v is the final velocity (which we're trying to find), u is the initial velocity (20 m/s in this case), g is the acceleration due to gravity (10 m/s²), and h is the height (15 m in this case).
Substituting the given values into the equation, we get:
v² = 20² - 21015 v² = 400 - 300 v² = 100
Taking the square root of both sides to solve for v, we get:
v = √100 v = 10 m/s
So, the velocity of the ball when it reaches a height of 15 m is 10 m/s.
Similar Questions
By what velocity a ball be projected vertically upwards so that the distance covered in 5th second is twice of that covered in 6th second. (g = 10 m/s2)
A ball is projected straight upwards with an initial velocity of 20 m/s. It will reach its maximum height in approximately Question 19Answera.2.5sb.1.02sc.3.06sd.2.04se.1.5s
A ball is projected straight up with an initial velocity of 20 m/s. After 0.3 seconds its velocity will be Question 7Answera.0 m/sb.-20 m/sc.22.94 m/sd.20 m/se.17.06 m/s
A ball is thrown vertically upwards with a velocity of 49 m/s and g =9.8 m/s2Calculate the max height it rises up to?112.5 mwrong245 m122.5 mcorrectnone of these12. Calculate the total time it takes to reach back to surface?20 sec
A ball is thrown vertically upwards with a velocity of 49 m/s and g =9.8 m/s2Calculate the max height it rises up to?112.5 m
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.