Sorthe chage istrbution shown at right, what is the vector sum of the forces evertee on particle 3 two metal rods a and b are initially lying end to end on a wooden table and their endsa carrying surplus positive charge is brought close to the middle of rod a (no sparks ju held in place, a person wearing insulating gloves pulls the rods a small distance apar moved far away from the rods a.) do the two rods attract each other, repel each other, or is there no electric force explain. b.) is the surplus charge on each rod positive, negative, or zero? explain.

the simple machine has three main features. they are:

fulcrum is the center point or pivot point of the machine. effort is input force/ applied force. load is external force/ output.

the keisha 's machine labels are

x : load

y: fulcrum

z: lever

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.