Given below are two statements. One is labeled as Assertion A  and the other is labeled as Reason R.

Assertion A: Two identical balls A and B thrown with same velocity ‘u’ at two different angles with horizontal attained the same range R. If A and B reached the maximum  height h1 and h2 respectively, then  

Reason R : Product of said heights.

Choose the correct answer :

Option 1 -

Both A and R are true and R is the correct explanation of A.

Option 2 -

Bothe A and R are true but R is NOT the correct explanation of A.

Option 3 -

A is true but R is false.

Option 4 -

A is false but R is true

0 2 Views | Posted 2 months ago
Asked by Shiksha User

  • 1 Answer

  • A

    Answered by

    alok kumar singh | Contributor-Level 10

    2 months ago
    Correct Option - 1


    Detailed Solution:

    First angle, θ1 = θ, R = u 2 s i n 2 θ g   

    Another angle (θ2 = 90 - θ) for which range will be

    Same as that of θ1 = θ

    R 1 = u 2 s i n 2 ( 9 0 θ ) g = u 2 g s i n 2 θ = R

    at  θ1=θ,h1=u2sin2θ2g

    & θ 2 = 9 0 θ , h 2 = u 2 s i n 2 θ 2 2 g = u 2 c o s 2 θ 2 g

    h 1 h 2 = 1 4 2 [ u 2 s i n 2 θ g ] 2  

    R = 4 h 1 h 2  

    So, Both statement is true & Reason is correct explanation for statement 1.

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