1) A screwdriver is an example of a wheel and axle, which is a type of simple machine. The mechanical advantage of a wheel and axle is the
ratio of the radius of the wheel to the radius of the axle. The force
required to turn a screw can be reduced by
)
A)
B)
)
D)
reducing the length of the axle.
increasing the radius of the axle.
reducing the length of the handle,
increasing the radius of the handle.

Asmall, positively charged ball is moved close to a large, positively charged ball. which describes how the small ball likely responds when it is released? it will move toward the large ball because like charges repel. it will move toward the large ball because like charges attract. it will move away from the large ball because like charges repel. it will move away from the large ball because like charges attract.

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Use the profile illustrated for problem (1). assume that the layer of silty sand fill (sm) is placed over the entire site. estimate the thickness of the fill (h - in feet) that will cause the effective vertical stress at the center of the clay layer to increase by 517.5 pounds per square foot.