You move a 75-kg box 35 m. this requires a force of 90 n. how much work is done while moving the box?

3150 J

Explanation:

Work is the result when a force acts on an object and moves it by some distance and it is calculated in Joules.  

So,

Distance covered by the box = 35m

Force applied on the box = 90N

Formula:

The force and the distance covered was in the same direction, so the angle between them is 0°. The work can be found using the formula:

W = Fd cosθ

W = Fd cos0  

W = Fd(1)

W= (90) * (35)

W = 3150 J

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.