A5-meter uniform plank of mass 100 kilograms rests on the top of a building with 2 meters extended over the edge as shown above. how far can a 50-kilogram person venture past the edge of the building on the plank before the plank just begins to tip?

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

Acar traveling at 22 m/s starts to decelerate steadily. it comes to a complete stop in 15 seconds. what is it’s acceleration?

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples