Engineering Mechanics - GATE practice papers - Mechanical for Q. 351

Q.  An object of 1 kg is attached to the string at the height of 100 m from the ground. What is the velocity of the object when it impacts on the ground, if it is released from string at 100 m?
Take acceleration due to gravity g=9.8 m/s2 (Marks: 02)
- Published on 19 Oct 15

a. 1960 m/s
b. 221.36 m/s
c. 44.27 m/s
d. none of the above

ANSWER: 44.27 m/s
 
No other than gravitational force is acting upon the object. Thus by using motion equation v2 = u2+ 2as and taking initial velocity of the object u = 0, we can get the final velocity that is 44.27 m/s.

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    Discussion

  • Anup    -Posted on 31 Mar 17
    How it is calculated? Plz explain in detail

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