A block of mass 10kg is moving in x-direction with a constant speed of 10 m/s . It is subjected to a retarding force F=-0.1 x joule / meter during its travel from x=20 meter to x=30 meter. Its final kinetic energy will be.
475 J
450 J
275 J
250 J
As we discussed in Concept
Net work done by all the forces give the change in kinetic energy -
- wherein
Option 1)
475 J
Option is correct
Option 2)
450 J
Option is incorrect
Option 3)
275 J
Option is incorrect
Option 4)
250 J
Option is incorrect