1.

8A paraglides jumps from an aeroplane. He falls down witha Velody of 78 m/s. He opens his parachote in air and hisVelocity of falling decreased to 50 m/s, within 12 s. Find theForce of air experienced on the paraglider if he weighs 50 kg.​

Answer»

Answer

  • The force experienced is 46 N

Explanation

Given

  • Initial velocity = 78 m/s
  • Final Velocity = 50 m/s
  • Time = 12 sec

To Find

  • Force that the paraglider experience

Solution

[So here we may FIRST find the acceleration of the body using the first Equation of motion, and then using the Newton's SECOND law will give us our final answer]

Acceleration of the Paraglider

➝ v = u+at

➝ 50 = 78 + a×12

➝ 50-78 = 12a

➝ -28 = 12a

➝ -28/12 = a

➝ Acceleration = -2.3 m/s²

Force Experienced

F = ma

➝ F = 50 × 2.3

➝ F = 46 N



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