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A ladder 2.5 m long and of weight 150 N ...

A ladder 2.5 m long and of weight 150 N has its centre of gravity 1 m from its bottom. A weight of 40 N is attached to the top end. The work required to raise the ladder from the horizontal position to the vertical position is

A

190 J

B

250 J

C

285 J

D

475 J

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TARGET PUBLICATION-LAWS OF MOTION-EXERCISE
  1. Which one of the following WRONG?

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  2. According to work-energy theorem, the work done by the net force on a ...

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  3. A ladder 2.5 m long and of weight 150 N has its centre of gravity 1 m ...

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  4. Choose the correct options Choose the WRONG statement.

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  13. When two bodies stick together after collision, the collision is said ...

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  14. Which of the following is NOT an example of inelastic collision?

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  15. For perfectly elastic collision

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  16. When a massive body suffers an elastic collision with a stationary li...

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  17. A ball of mass 5 kg travelling with velocity of 15 cm/s makes a head o...

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  18. The ratio of relative velocity of separation after collision to the re...

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  19. Choose the correct options A block of mass m moving at a speed of u c...

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  20. A body of mass 0.1 kg travelling with a velocity of 5 m/s, collides h...

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