1 The two objects stick together after the collision and move with a common velocity v f. 2  Assume the motion is along the x-direction. 3  We then have. 4  m 1 v 1 + m 2 v 2 = (m 1 + m 2)v f. 5  m 1 is the mass of the bullet, v 1 its initial velocity, m 2 is the mass of the block, v 2 its initial velocity.
The agreement based on overt grammatical categories as above is formal agreement, in contrast to notional agreement, which is based on meaning. For instance, the phrase The United Nations is treated as singular for purposes of agreement even though it is formally plural.he agreement based on overt grammatical categories as above is formal agreement, in contrast to notional agreement, which is based on meaning. For instance, the phrase The United Nations is treated as singular for purposes of agreement even though it is formally plural.
inÂ·forÂ·mal. adj. 1. Not formal or ceremonious; casual: an informal gathering of friends; a relaxed, informal manner. 2. Not being in accord with prescribed regulations or forms; unofficial: an informal agreement.3. Suited for everyday wear or use: informal clothes.nÂ·forÂ·mal. adj. 1. Not formal or ceremonious; casual: an informal gathering of friends; a relaxed, informal manner. 2. Not being in accord with prescribed regulations or forms; unofficial: an informal agreement.