Awool cloth becomes positively charged as it
a) loses electrons
b) gains protons
c) loses protons
d) gains electrons

Option (A)

Explanation:

A body attains positive charge as some of the electrons removed from the body. As the electrons are negatively charged, if electrons removed, then the negative charge is removed and then the object remains some positive charge. because atom is electrically neutral.

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

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.