Solved papers for JEE Main & Advanced JEE Main Online Paper (Held On 23 April 2013)
done JEE Main Online Paper (Held On 23 April 2013) Total Questions - 3
question_answer1) A particle of mass 2 kg is moving such hat at time t, its position, in meter, is given by \[\overset{\to }{\mathop{\operatorname{r}}}\,(\operatorname{t})=5\hat{i}-2{{\operatorname{t}}^{2}}\hat{j}.\]The angular momentum of the particle at \[\operatorname{t}=2s\] about the origin in kg \[{{\operatorname{m}}^{-2}}\]\[{{\operatorname{s}}^{-2}}\] is :
[JEE Main Online Paper ( Held On 23 April 2013 )
question_answer2) A boy of mass 20 kg is standing on a 80 kg free to move long cart. There is negligible friction between cart and ground. Initially, the boy is standing 25 m from a wall. If he walks 10 m on the cart toward the wall, then the final distance of the boy from the wall will be:
[JEE Main Online Paper ( Held On 23 April 2013 )
question_answer3) A body of mass 'm' is tied to one end of a spring and whirled round in a horizontal plane with a constant angular velocity. The elongation in the spring is 1 cm. If the angular velocity is doubled, elongation in the spring is 5 cm. The original length of the spring is:
JEE Main Online Paper ( Held On 23 April 2013 )