Question

Question #ed040

Answer 1

See below

Explanation:

The total mechanical energy, `E`, is the sum of the kinetic energy, `T = 1/2 m v^2`, and the potential energy, `V(x)` as mentioned.

If all the energy is kinetic, then `1/2 v^2 =2`, as `m = 1`

So, `v^2 =4 implies v = pm 2`

As speed `= abs v`, we go with (1)

:)