Question

Let u =(I+j+k)m/s and a = (2i+3j+4k)m/s.The velocity of the body at the end of 3 second is?

Answer 1

2i+3j+4k = (v- I-j-k)/3
6i+9j+12k = v-I-j-k
v=7i+10j+13k