A force acting on an object moving along the x axis is given by Fx = (14x − 3.0x^2) N where x is in m. How much work is done by this force as the object moves from x = −1 m to x = +2 m?

Consider an object of mass m = 4 kg on a frictionless table. The object experiences a repulsive force F = a/x2 + b/x, where F is in newtons and x is the position of the object relative to the origin. Write an expression for the work done by the repulsive force on the object as it moves from an initial position of x1 to a final position of x2.    If the object starts at a position of x1 = 8.5 m apart, how much work, in joules, is required by an external force to bring it to a position of x2 = 2.5 m apart when a = 19 and b = 11?    If the object starts at rest at a position x3 = 1.3 m and is released, at what speed v, in meters per second, will the object be moving when it is at position x4 = 12.5 m?

A force F (x) = (10 − 2x) N applied in the positive x-direction moves an object 3 m from x = 2 to x = 5. The work done by the force on the object is ____. 4 joules 9 Joules 6 Joules 21 joules

On a horizontal surface, an object slides from point P to point Q along a straight line, then slides back from Q to P along a semicircle. If P and Q are a distance L apart, how much work did the force of kinetic friction do during the entire process? The magnitude of fk is fk.