Aman has an air conditioner he wants to load into the back of his truck. instead of lifting the air conditioner and carrying it to the truck, he improvises a ramp. he takes a board that is 3.6 meters long and places one end of it in the back of his truck, 1.2 meters off the ground. he leaves the other end of the board on the ground. he places the air conditioner on a dolly and pushes them both up the ramp and into the truck. what is the mechanical advantage of the ramp?
a)
2.5
b)
3.0
c)
4.32
d)
4.8

Option B, 3.0

Explanation:

Basically , mechanical advantage help us is determining force that is required to pull up an object of certain weight over the ramp. It is a ratio and its general formula is

Where L represents the length of  the inclined ramp and H represents the height of the inclined ramp

Substituting the given values in above equation, we get -

Hence , the mechanical advantage is 3.0

Option B is correct

increase soil erosion                                             reduce soil erosion

cattle grazing                                                         hydroseeding

deforestation                                                         contour plowing

                                                                                planting vegetation

plant roots basically hold the top soil

together and stop soil erosion because

in such situation top soil is not removed

during flood but cattle grazing causes

soil erosion because cattle consume the

grasses and herbs and top soil is exposed.

same situation occurs because of

deforestation, the trees and plants are cut

down to expose top soil which causes soil

erosion