According to Newton's first law, when the net force on the body is zero, the result will be that the body will have constant velocity. So when the force of friction on fireman's hands and the weight are equal, the fireman will slide down the pole with a constant velocity.
The cosmic microwave background<span> (CMB) is electromagnetic </span>radiation<span> as a remnant from an early stage of the universe in Big Bang cosmology. In older literature, the CMB is also variously known as </span>cosmic microwave background radiation<span> (CMBR) or "relic </span>radiation<span>"</span>
. In single particle problem whole mass is concentrated at a single point so it has a single displacement, single velocity and single acceleration. while, in rigid body mass is distributed