NEETPhysicsWork, Power and Energy
The kinetic energy ( E _ k ) of a particle moving along X -axis varies with its position (X) as shown in the figure. The force acting on the particle at X=10 ~m is
Options
- A5 i N
- B0 ~N
- C97.5 i N
- D-5 i N
Correct answer
D. -5 i N
Step-by-step solution
d k d x = d ( 1 2 m v^2 ) d x = 1 2 m 2 v d v d x =m a=F So, Force is slope at x=10 m F=- 20 4 =-5 i