A body of mass 1 kg is thrown upwards with a velocity 20 m/s. It momentarily comes to rest after attaining a height of 18 m. How much energy is lost due to air friction? ()
30 J
40 J
10 J
20 J
As discussed in
Net work done by all the forces give the change in kinetic energy -
- wherein
Loss in Energy =
Option 1)
30 J
This solution is incorrect
Option 2)
40 J
This solution is incorrect
Option 3)
10 J
This solution is incorrect
Option 4)
20 J
This solution is correct