Question

a stone is thrown vertically upwards by a boy IT returns to his hands in 3 seconds how high does the stone rise​

Answer 1

Answer:

15/4 m/sec

Explanation:

given that stone come back to hand it means distance travelled by stone is zero and let initial speed is U then time taken to comeback is 3 second but time taken to reach the maximum height is 3/2 second cause there is no air resistance. hence we can use formula S=it+1/2at^2 and on putting the values we can get you equal to 15/4