How Much Force Does John Need to Lift Himself?

John needs to apply a force of 440 N to accomplish lifting himself a distance of 0.40 m by doing 176 J of work.

In physics, work is defined as the force needed to move an object over a certain distance. In this case, John does 176 J of work by lifting himself a distance of 0.40 m. To calculate the amount of force required, we can use the formula:

Force (N) = Work (J) / Distance (m)

By substituting the given values into the formula, we get:

Force = 176 J / 0.40 m = 440 N

Therefore, John must apply a force of 440 Newtons to lift himself a distance of 0.40 meters.