Work out how much energy is saved by changing the bumper - set of a 1 000 kg car from steel to alumin um, over an assumed life of 200,000 km . T he energy consumption per kg per km for a 1000 kg car powered by gasoline i s 2.1 x 10 - 3 MJ/ ( km * kg )

answer: the direction of the wind is expressed as the direction from which the wind is blowing. for example, easterly winds blow from east to west, while westerly winds blow from west to east.

explanation:

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards