Chapter 2 - Motion in a Straight Line

Question 1

What’s the difference between instantaneous and average?

Answer 1

Instantaneous is at a single point in time. This is often found using calculus.

The average is found for that of a longer period of time.

Question 2

What’s the difference between speed and velocity, position and displacement?

Answer 2

Speed is the magnitude of velocity and doesn’t have a direction, whereas velocity is a vector.

The position is a scalar, displacement is a vector quantity.

Question 3

How are x, v and a related in terms of t using calculus?

Answer 3

x = antidiff v(t)
v = dx/dt
v = antidiff a(t)
a = dv/dt