A particle of mass m0 ascends from the earth’s surface with zero velocity due to the action of two force as shown in the figure. The force varies with height y as F = -2 mg (1 – ky), Where k is a positive constant. The work performed by this force F over the first half (distance) of the ascent is

Q: A particle of mass m0 ascends from the earth’s surface with zero velocity due to the action of two force as shown in the figure. The force varies with height y as F = -2 mg (1 – ky), Where k is a positive constant. The work performed by this force F over the first half (distance) of the ascent is

Numerical

(a) mg/(2 k)

(b) 2mg/( k)

(c) 3mg/(4 k)

(d) 2mg/(3 k)

Click to See Answer :
Ans: (c)