Question

Question #d8659

Answer 1

`"See explanation"`

Explanation:

`a = {dv}/dt`

`"So acceleration (a) is the derivative of the velocity v with respect"`
`"to the time t."`

`"v = {dx}/dt`

`"So velocity is the derivative of the position x and can be negative!"`
`"Velocity can also be a vector with a direction."`

`"Speed is like velocity but is always positive, so it can be seen"`
`"as the absolute value of velocity :"`
`"In the case of a velocity vector, speed is the norm of v."`

`s = | v |`