Q12.A horizontal force of 10 N is necessary to just hold a block stationary against a wall. The co-efficient of friction between the block and the wall is 0.2 . The weight of the block is (1) 20 N (2) 50 N (3) 100 N (4) 2 N
What This Question Tests
This question involves applying the concept of static friction and force equilibrium to determine the weight of a block held against a wall by a horizontal force.
Concepts Tested
Formulas Used
f_s_max = μ_s N
ΣF = 0
📚 NCERT Sections This Tests
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12.5 A hydrogen atom initially in the ground level absorbs a photon, which excites it to the n = 4 level. Determine the wavelength and frequency of photon.
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12.4 The ground state energy of hydrogen atom is –13.6 eV. What are the kinetic and potential energies of the electron in this state?
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11.3 The photoelectric cut-off voltage in a certain experiment is 1.5 V. What is the maximum kinetic energy of photoelectrons emitted?
📋 Question Details
- Chapter
- Friction
- Topic
- Static friction
- Year
- 2003
- Shift
- Unknown
- Q Number
- Q12
- Type
- MCQ
- NCERT Ref
- Class 11 Physics Ch 5: Laws of Motion
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