Question

Q. If a ball is thrown vertically upward what will be the maximum height it will reach. (using Newton’s 3rd equation of motion) 


a) S= (V²-U²)/2g

b) S= -(V²/2g)

c) S= (U²/2gt)

d) S= -(U²/2g)

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Answer 1

Answer:

(d) -(U²/2g)

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Answer 2

Answer:

the correct answer is option d

Explanation:

The third equation of motion says v²=u²+2as

but here a=g

therefore, v²=u²+2gs

s=v²-u²/2g

s=0-u²/2g ( since the final velocity will be zero)

then s= -(u/2g)

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