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JEE Main 202430 JanuaryEvening Shift
Exam
JEE Main
Year
2024
Date
30 January
Shift
Evening Shift
Subject
Physics
Chapter
Work, Power and Energy

JEE Main 2024 · 30 January · Evening Shift · Physics · Work, Power and Energy

A block of mass 1kg is pushed up a surface inclined to horizontal...

A block of mass 1kg1kg is pushed up a surface inclined to horizontal at an angle of 60°60 ° by a force of 10N10N parallel to the inclined surface as shown in figure. When the block is pushed up by 10m10m along inclined surface, the work done against frictional force is : \left[g = 10m{s}^{- 2}\right]$

A block of mass 1kg is pushed up a surface inclined to horizontal at an angle of 60 ° by a force of 10N parallel to the

Options

  1. A53J5\sqrt{3}J
  2. B5J5J
  3. C5×103J5 \times {10}^{3}J
  4. D10J10J

Correct answer

B. 5J5J

Step-by-step solution

Work done against frictional force  

=\muN×10=μ(mgcos60°)×10= \muN \times 10 = \mu\left(mgcos60 °\right) \times 10

=0.1×5×10=5J= 0 . 1 \times 5 \times 10 = 5J

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