Question: The work done in pulling up a block of wood weighing 2 𝑘𝑁 for a length of 10 𝑚 on a smooth plane inclined at an angle of 15° with the horizontal is [sin 15° = 0.2588]
(A) 4.36 𝑘𝐽
(B) 5.17 𝑘𝐽
(C) 91 𝑘𝐽
(D) 9.82 𝑘𝐽
Answer: Option (B)
Solution:
![The work done in pulling up a block of wood weighing 2 𝑘𝑁 for a length of 10 𝑚 on a smooth plane inclined at an angle of 15° with the horizontal is [sin 15° = 0.2588]](https://i0.wp.com/ezeenotes.in/wp-content/uploads/2022/05/167.png?resize=286%2C78&ssl=1)