From the top of a cliff 50m above sea level, a stone is thrown vertically upwards with a velocity of 15m/s. After how many seconds and with what velocity will it hit the sea?

S=ut - 1/2gt"2..{against gravity}.

15t =5t"2..t=0 or 3..t=3s. or 2u/g=3s.

V=0 + gt=10 x 3=30m/s

or

Given,

Initial velocity in upwards direction (u) = -15m/s

Acceleration (a) = 10 m/s2

Distance (s) = 50 m

Final velocity (v) =?

Time taken (t) =?

………..

Final velocity,

2as = v2-u2

2 (10) (50) = (v) 2 – (-15)2

1000 = v2 – 225

1000+225 = v2

1225 = v2

35 = v

Therefore final velocity = 35 m/s

………………..

Time taken,

V=u+at

35=-15+10.t

35+15=10t

50=10t

50/10=t

5=t

Therefore time taken = 5 sec.

hello, i am papaguy your answer is ready.

answer: the pronoun that is used in the given subject above is the word "himself" which refers to the noun or antecedent "maestro". the pronoun is an example of an intensive pronoun. intensive pronouns are used to add emphasis to the subject of the sentence and it uses reflexive pronouns such as myself, yourself, himself, herself, themselves and ourselves. 

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