Consider the three displacement vectors
a=(3i+3j)meters,
b-(i-4j) m
c=(-2i+5j) m
use the component method to determine
a) the magnitude and direction of the vector d= a+b+c
b) the magnitude and direction of e=-a-b+c

Acatapult is tested by roman legionnaires. they tabulate the results in a papyrus and 2000 years later the archaeological team reads (distances translated into modern units): range = 0.4 km; angle of launch = π/5 rad; landing height = launch height. what is the initial velocity of launch of the boulders if air resistance is negligible?

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

In a system, when potential energy decreases, then entropy also decreases. true false