2 Answers

Founddrama · Answer 1 · 2017-09-12T06:36:01+0000

work done = force * distance moved (in direction of the force)

force= mass* acceleration

force=58.1N

58.1*(5.8*10^4)
=3,369,800 J

Bindiya Patoliya · Answer 2 · 2017-09-14T17:12:04+0000

The correct answer to the question is
$336.98* 10^4\ J$

CALCULATION:

The acceleration of the truck is given as a =
$0.0083\ m/s^2$

The mass of truck is given as m = 7000 kg.

The distance travelled by the truck S =
$5.8* 10^(4)\ m$ .

The force applied on the truck is calculated as -

Force F = mass × acceleration

=
$7000\ kg* 0.0083\ m/s^2$

= 58.1 N.

We are asked to calculate the work done .

The work done by a body is calculated as -

W =
$\vec F.\vec S$

=
$FScos\theta$

Here,
$\theta$ is the angle between force and displacement.

If
$\theta=0^(0)$ , then W = FS

Hence, the work done by the truck W = FS

=
$58.1\ N* 5.8* 10^(4)\ m$

=
$336.98* 10^4\ J$

Here, J ( joule ) is the unit of work.

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