A box rests on the (frictionless) bed of a truck. The truck driver starts the truck and accelerates forward. The box!

immediately starts to slide toward the rear of the truck

bed. Discuss the motion of the box, in terms of Newton's

laws, as seen (a) by Mary standing on the ground beside

the truck, and (b) by Chris who is riding on the truck

(Fig. 4–35).

follows are the solution to the given point:

Explanation:

In point A:

The meet is next to the truck on the floor, and for Mary, its box is fixed wrt. Since no power occurs, no speed is going to be happening. So, Mary's box seems to be at rest.

In point B:

Chris and as well as the box ride mostly on the truck because the truck was accelerating, it has been said that Chris will be in a non-inert position mostly on the truck. For Chris, its box is thrown backward as well as the box is moved because of another force.

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.