Question

the angle between the force vector equal to 3 ICAP + 4 j cap - 5 k cap unit displacement d and D vector 5 ICAP + 4 j cap + 3 k CAP​

Answer 1

Answer:

Explanation:

A.B = |A|×|B|×COS(x)

3i+4j-5k.5i+4j+3k=(3²+4²+5²)½×(5²+4²+3²)½×COS(x)

16 =50×cos(x)

x = arc cos(16/50)