Question

guys please answer these questions ​

Answer 1

Answer:

1.(c) negative

2.(b) velocity

Answer 2

Answer:

1)a ,magnitude can't be zero

the magnitude is zero if and only if all elements is zero

for ex if a vector a= x1+x2+x3 then a=0 if ,root of x1^2+x2^2+x3^2=0 if x1= 0,x2=0,x3=0

2) rate of change of displacement is velocity