Question

2. Velocity and acceleration of a particle at some instant are
V = (31 - 4j + 2 k)m/s and a = (21 +1 -2K)m/s^2?
1 What is the value of dot product of v and a at the given instant?
2What is the angle between v and a, acute, obtuse or 90.
3 at the given instant, whether speed of the particle is increasing, decreasing or constant?​

Answer 1

Answer:

The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. Velocity is equivalent to a specification of an object's speed and direction of motion (e.g. 60 km/h to the north).