A particle of mass 100g is thrown vertically upward with a speed of 5m/s. The work done by the force of gravity during the time the particle goes up is
Using work energy theorem,work done = change in Kinetic energy →
i.e. work done by gravity should be equal to change in the kinetic energy of the particle.
given mass = 100g ; initial velocity = 5m/s; final velocity = 0; substitute in the above equation
Work done by force of gravity = -1.25J