Multiple choice general knowledge math & puzzles

Nagraj hangs by his usual sarp-rassi which supports his weight. If the mass of nagraj is 8 kg, then what is the force exerted by sarp-rassi on nagraj if nagraj is hanging still and is performing no action. Take g=10 units

  1. cant be determined

  2. 72 newton

  3. 80 newton

  4. 8 newton
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When hanging stationary, the rope exerts an upward force equal to the person's weight. Weight = mass × gravity = 8 kg × 10 m/s² = 80 N. This upward tension balances the downward gravitational force.

AI explanation

To determine the force exerted by the sarp-rassi (rope) on Nagraj, we need to consider the gravitational force acting on Nagraj.

The gravitational force can be calculated using the formula:

[F = mg]

Where:

  • (F) is the gravitational force
  • (m) is the mass of the object (Nagraj in this case)
  • (g) is the acceleration due to gravity (given as 10 units)

Given that the mass of Nagraj is 8 kg and (g = 10), we can substitute these values into the formula to calculate the gravitational force:

[F = 8 \times 10 = 80 \text{ newton}]

Therefore, the force exerted by the sarp-rassi on Nagraj is 80 newton.

The correct answer is option C, 80 newton.

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