The vector r(t) is the position vector of a particle at time t. Find the angle between the velocity and the acceleration vectors at time t = 0.r(t) = 
ti + (t + 
t2)k
A. 
B. 0
C. 
D. ?
Answer: C
Mathematics
You might also like to view...
Determine whether the set is finite or infinite.{x | x ? N and x ? 100}
A. Finite B. Infinite
Mathematics
Evaluate. Assume that all variables represent positive numbers. 
A. 13 B. 3 C. -13 D. -3
Mathematics
Add or subtract as indicated. Simplify, if necessary.
+ 
A. 
B. 
C. 
D. 
Mathematics
Find the probability.A box contains 3 white, 2 green, 2 red, and 1 blue marble. A marble is drawn at random and replaced and then a second marble is drawn. Find the probability that both marbles are red.
A. 
B. 
C. 
D. 
Mathematics