A20.0 kg object is at rest, and then speeds up to 16.0 m/s. how much work was done on this system?

Answer : Work done, W = 2560 J.

Explanation :

It is given that,

The mass of an object, m = 20 kg

Initial speed of the object, u = 0

Final speed of the object, v = 16 m/s

We know that the work done by an object is equivalent to the change in kinetic energy.

So,

So, the work done on this system is 2560 J.

diagram is missing, but i will try to explain your doubt.

answer:

amplitude is the maximum displacement or distance moved on a point of a vibrating body or wave measured from its equilibrium position.it is equal to half the length of vibration path.