Laws of Motion

JEE Main 2025 (Online) 24th January Evening ShiftNumericalMedium📈 Topic in 16% papers+4

Ques. 1JEE Main 2025, 24 January (Evening Shift)

[figure] A string of length L is fixed at one end and carries a mass of M at the other end. The mass makes ( 3 ) rotations per second about the vertical axis passing through end of the string as shown. The tension in the string is ML.

Answer

Solution

The horizontal part of T gives the centripetal force; R=L .

[figure]

T =M 2L T=M 2L

=2 f=2 3 =6 rad/s

T=36 ML

Answer: 36

Keep practising — Laws of Motion

Ques. 2JEE Main 2025, 22 January (Evening Shift)

A tube of length 1 m is filled completely with an ideal liquid of mass 2M, and closed at both ends. The tube is rotated uniformly in horizontal plane about one of its ends. If the force exerted by the liquid at the other end is F then angular velocity of the tube is F M in SI unit. The value of is .

All Laws of Motion PYQs →

PDFDownload Laws of Motion PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇

All JEE Main Physics chapters

Class 11Units and Measurements Motion in a Straight Line Motion in a Plane Laws of Motion Work, Energy and Power System of Particles and Rotational Motion Gravitation Mechanical Properties of Solids Mechanical Properties of Fluids Thermal Properties of Matter Thermodynamics (Physics)Kinetic Theory Oscillations Waves

Class 12Electric Charges and Fields Electrostatic Potential and Capacitance Current Electricity Moving Charges and Magnetism Magnetism and Matter Electromagnetic Induction Alternating Current Electromagnetic Waves Ray Optics and Optical Instruments Wave Optics Dual Nature of Radiation and Matter Atoms Nuclei Semiconductor Electronics Experimental Skills (Physics)