Work, Energy, and Power

A box is pushed horizontally across a frictionless floor with a force of 10 N for a distance of 2 meters. If the force is parallel to the displacement, what is the work done on the box?

An object of mass $m$ is pulled along a rough horizontal surface by a force $F$ at an angle $\theta$ above the horizontal. The block moves a distance $d$. What is the net work done on the block?

A variable force acting on an object is described by $F(x) = 3x + 5$, where $F$ is in Newtons and $x$ is in meters. What is the work done by this force as the object moves from $x = 1$ m to $x = 4$ m?

A 5 kg block is pulled up a ramp that is 2 meters high. The block is pulled at constant speed. During this process, the work done by friction is -20 J. What is the work done by the applied force?

A projectile is launched with an initial velocity $v_0$ at an angle $\theta$ above the horizontal. Air resistance is negligible. What is the work done by gravity on the projectile as it moves from the launch point to the highest point of its trajectory?

A block slides down a rough inclined plane. The potential energy at the top is 100 J. When the block reaches the bottom, its kinetic energy is 70 J. How much work was done by friction?

A block is pulled 5 meters along a horizontal surface with a force of 12 N at an angle of 60 degrees above the horizontal. The frictional force is 2 N. What is the net work done on the block?

Which of the following is a characteristic of a conservative force?

A graph of force versus position is given. The force varies linearly from 0 N at x = 0 m to 10 N at x = 2 m. The force remains constant at 10 N from x = 2 m to x = 4 m. What is the total work done by the force from x = 0 m to x = 4 m?

An object with a mass of 2 kg has a net work of 16 J done on it. If its initial velocity was 2 m/s, what is its final velocity?