A pencil is dropped from the roof of the school what is the speed after 3s down is the negative direction.

I'm confused on what equation to use

The specific gravity of upper mantle rock is: A. 2.7 B. 3.0 C. 3.3 D. 5.5

A straight wire is positioned in a uniform magnetic field so that the maximum force on it is 4.0 N. If the wire is 80 cm long and carries a current that is 2 A, what is the magnitude of the magnetic field

A pulley system used to lift car tires has a mechanical advantage of 11.2. If you pull on the pulley with a force of 150 N, how much force does the pulley exert on the tire?

The capacitance of A conductor is affected by the presence of A second conductor that is uncharged and isolated electrically. Why?

Vector A has a magnitude of 35.1 m/sec and a direction of 215 degrees. What are its x - and y - components?

When is the average velocity equal to the instantaneous velocity

Tightening a screw with a larger spacing between its threads requires fewer turns of a screwdriver than tightening a screw with smaller thread spacing. What is a disadvantage of the screw with larger thread spacing?

The role of plants in the water, oxygen, nitrogen, and carbon cycles

As pitch gets higher, wavelength gets?

What term is used to describe the 4 in the expression 4 Ca (NO³) ²