What is the result of two displacement vectors having opposite directions?
question 20 options:
the resultant is the sum of the two displacements, having the same direction as the smaller vector.
the resultant is the sum of the two displacements, having the same direction as the larger vector.
the resultant is the difference of the two displacements, having the same direction as the smaller vector.
the resultant is the difference of the two displacements, having the same direction as the larger vector.

Resultant of two vectors having opposite direction is the difference of the two displacements having the same direction as the larger vector.

Explanation:

Resultant of two vectors is obtained by performing the vector addition operation. When the directions of both vectors are same the resultant’s direction will also be the same as the inputs. When two vectors have opposite directions, one direction will be taken positive making one vector positive and the other negative.

By performing addition of a positive and negative number we are actually taking the difference between both. Thus performing vector addition of two vectors with opposite directions is equivalent to finding the difference between the vectors. Consider a system consisting of a solid block, on which two forces F1 and F2 act in the opposite direction.

One force will be considered positive and the other is considered negative. The resultant is given by the difference of two force vectors. Displacement of the block will be in the direction of the greater force.  

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.