A bolt or a nut is tightened by turning it in a clockwise direction and loosened by turning it counterclockwise. What type of threads do bolts or nuts have?

The diagram above shows four slides made of the same material. The same kind of ball is thrown down each slide at the same time and at the same velocity. From

If the force of friction is greater than the force applied in the given direction, then in which direction will the box move?

If drive wheel A in the above diagram rotates in a clockwise direction, then drive wheel B will __________________.

Which pictures (1 to 4) above will result in Cube A once folded?

The weight of man A is 250 lbs and the weight of man B is 200 lbs. Which man must exert more effort in order to hold the 100 lb load?

With which of the screwdrivers in the diagram above will it be possible to unscrew the screw most efficiently such that equal amount of force is exerted on the handle of the screwdriver.

Which choices (1 to 5) will correctly complete the sequence?

The pendulums of each wall clock in the above diagram weigh the same. If the clocks strike 12 and the pendulums start swinging, which pendulum will complete one full stroke in the shortest amount of time?

If the cam (projecting part of a rotating wheel or shaft that strikes a lever at one or more points on its circular path) rotates in a counterclockwise direction, the bird will _______________________.

Which battery circuit diagram shows batteries coupled in series?