How much work is required to move a box through a distance of 3 m in the direction of a force of 25 N?

A body of 2 kg mass is thrown horizontally and attains a speed of 15 m/s. Find its kinetic energy.

Two forces act on a body: F1 = 3î - 5î + 2k̂ and F2 = 8î + 2î - 3k̂. The total displacement of the body is 25 m along the direction of 3î - 4î. Find the work done on the body (in Joules).