The work done in pulling up a block of wood weighing 2 kN for a length of 10m on a smooth plane inclined at an angle of 15 ∘ with the horizontal is Options: A . &nbsp4.36 kJ B . &nbsp5.17 kJ C . &nbsp8.91 kJ D . &nbsp9.82 kJ

Answer: Option B : B W = m g s i n θ × s = 2 × 10 3 × s i n 15 ∘ × 10 = 5.17 k J

The work done in pulling up a block of wood weighing 2 kN for a length of 10m on

Question

The work done in pulling up a block of wood weighing 2 kN for a length of 10m on a smooth plane inclined at an angle of

15^{\circ}

with the horizontal is

Options:

A . 4.36 kJ

B . 5.17 kJ

C . 8.91 kJ

D . 9.82 kJ

Answer: Option B
:
B

W = m g s i n θ \times s

= 2 \times 10^{3} \times s i n 15^{\circ} \times 10

= 5.17 k J

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