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Exam Details

IIT JEE 1998 SCREENING

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Questions 2
Duration 180 mins
Package IIT-JEE Advance - Previous Year Papers

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Showing all 2 questions in this paper.

Subject distribution

Physics
2 Qs

Topic distribution

Mechanics
2 Qs

Subtopic distribution

Work Power And Energy
2 Qs

Difficulty distribution

Medium 2 100%

Question type distribution

Multiple Choices 2 100%

Syllabus

Full Syllabus

Sample questions from this paper

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1
1998 · Physics · Mechanics · Work Power And Energy
IIT JEE 1998 SCREENING
A stone tied to a string of length L is whirled in a vertical circle with the other end of the string at the center. At a certain instant of time, the stone is at its lowest position, and has a speed u. The magnitude of the change in its velocity as it reaches a position where the string is horizontal is
A
\(\sqrt {{u^2} - 2gL}\)
B
\(\sqrt {2gL}\)
C
\(\sqrt {{u^2} - gL}\)
D
\(\sqrt {2\left( {{u^2} - gL} \right)}\)
2
1998 · Physics · Mechanics · Work Power And Energy
IIT JEE 1998 SCREENING
A force \(F = - K\left( {y\widehat i + x\widehat j} \right)\) (where K is a positive constant) acts on a particle moving in the xy plane. Starting from the origin, the particle is taken along the positive x axis to the point \(\left( {a,0} \right)\), and then parallel to the y axis to the point \(\left( {a,a} \right)\). The total work done by the force F on the particle is
A
\(- 2K{a^2}\)
B
\(2K{a^2}\)
C
\(- K{a^2}\)
D
\(K{a^2}\)