Question

A boy threw a ball vertically upward with an initial velocity of 5 m/s. After how much time

does the ball come back to his hand? (Take g=10 m/s2).
​

Answer 1

Answer:

Animals which live in the forest help it grow and regenerate in following ways:

By eating vegetation they clear land for fresh growth

Animals help flowering plants in pollination and seed dispersal

Dead remains of animals make humus after decomposition. This increases soil fertility

Answer 2

Explanation:

Given final velocity v= 0 m/s and displacement h= 20 m; acceleration due to gravity = 10 m/ s

2

From equation of motion

v

2

=u

2

+2gs

−u

2

=−2(10).20

u=20m/s

and time t can be determined by the formula

t=

g

v−u

=

−10

−20

=2s

total time = 2× time of ascend=2×2=4s

MARK AS BRAINLIEST