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1
JEE Main 2021 (Online) 26th August Morning Shift
Numerical
+4
-1
A uniform chain of length 3 meter and mass 3 kg overhangs a smooth table with 2 meter lying on the table. If k is the kinetic energy of the chain in joule as it completely slips off the table, then the value of k is ................. . (Take g = 10 m/s2)
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2
JEE Main 2021 (Online) 27th July Evening Shift
Numerical
+4
-1
A small block slides down from the top of hemisphere of radius R = 3 m as shown in the figure. The height 'h' at which the block will lose contact with the surface of the sphere is __________ m.

(Assume there is no friction between the block and the hemisphere)

JEE Main 2021 (Online) 27th July Evening Shift Physics - Work Power & Energy Question 38 English
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3
JEE Main 2021 (Online) 25th July Evening Shift
Numerical
+4
-1
A force of F = (5y + 20)$$\widehat j$$ N acts on a particle. The work done by this force when the particle is moved from y = 0 m to y = 10 m is ___________ J.
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4
JEE Main 2021 (Online) 25th July Morning Shift
Numerical
+4
-1
In the reported figure, two bodies A and B of masses 200 g and 800 g are attached with the system of springs. Springs are kept in a stretched position with some extension when the system is released. The horizontal surface is assumed to be frictionless. The angular frequency will be ____________ rad/s when k = 20 N/m.

JEE Main 2021 (Online) 25th July Morning Shift Physics - Work Power & Energy Question 40 English
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