Respuesta :

Answer;

Work = 125 joules

Explanation and solution;

  • Work is the product of force and the distance covered. Therefore, Work = force × distance.
  • Work is measured in joules.
  • Work is also a change in energy, such that work is done when energy changes, so when kinetic energy, or potential energy changes the there is work being done.

Thus; kinetic energy = work done

Kinetic energy = 1/2mv²

                       = 1/2 × 10× 5²

                       = 5 × 25

                       = 125 joules

Hence, work done is 125 joules.

pstnonsonjoku

From the calculations, the work done by the dog is 600 J.

What is work?

Work is done when the force applied covers a distance in the direction of the force.

Using the equations of motion;

v^2 = u^ - 2as

since v =0

u^2 = 2as

But

v = u - at

u = at

a = u/t

a = 5/2.4

a = 2.1m/s^2

s = u^2 /2a

s = (5)^2/2 *  2.1

s= 6 m

Work done = 10 Kg * 10ms-2 * 6 = 600 J

Learn more about work done:https://brainly.com/question/13662169

#SPJ5

Otras preguntas