The work done can be calculated using the formula W = Fd cosθ, where W is the work done, F is the force, d is the displacement, and θ is the angle between the force and displacement vectors.
The unit of measurement for work done is joules (J).
The direction of the work done is determined by the angle between the force and displacement vectors. If the angle is greater than 90 degrees, the work done is negative and if the angle is less than 90 degrees, the work done is positive.
Yes, the work done can be negative when the angle between the force and displacement vectors is greater than 90 degrees. This indicates that the force is working against the displacement, resulting in a negative work done.
Some other factors that should be considered when solving this type of homework question include the direction of the displacement, the angle between the force and displacement vectors, and the type of motion (e.g. constant velocity, acceleration, etc.). It is also important to double check the units of measurement and use the correct formula for calculating work done.