Suppose a box is being dragged across the floor due to a rope being pulled on at a angle from the side, as shown in the picture below.

If the tension in the rope is and the box accelerates to the right at , what is the coefficient of kinetic friction?

An hourglass is placed on a scale with all its sand in the upper chamber. A short time later, the sand begins to fall into the lower chamber. Which of the following best describes the reading on the scale as a function of time before any sand has accumulated in the bottom chamber?

A cinder block sitting on a frictionless surface is attached to a rope. If the rope is pulled parallel to the surface such that the block accelerates at a rate of , what is the minimum amount of tension the rope must be able to support without breaking?

Two small lead balls of masses and are fixed a distance apart on a laboratory bench. A student moves the larger mass toward the smaller mass so the distance is now only . After the mass was moved, by what factor did the gravitational force between the lead balls change?

An object weighing is hanging from a string with no mass and a length of . If this object is released from some initial height and reaches a maximum velocity of , what is the maximum amount of tension in the string at any point during the object's journey?

Suppose a box is being dragged across the floor due to a rope being pulled on at a angle from the side, as shown in the picture below.

If the tension in the rope is and the box accelerates to the right at , what is the coefficient of kinetic friction?

Which of these forces is identical to a normal force?

A bowling ball is dropped from a height of onto a spring. If the spring is to compressed before halting the ball, what is the spring constant of the spring?

A mechanic is able to exert a maximum torque of using a small wrench. The mechanic adds an attachment to the wrench that doubles the handle length. What is the maximum amount of torque the mechanic can exert with the new wrench?

An object weighing sits on a board at a distance away from a fulcrum. At what distance to the right of the fulcrum would an object need to be in order to make the board flat?