搜狗做题网a) name some advantages of moving an object up a ramp instea
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a) name some advantages of moving an object up a ramp instead of lifting it vertically upward
b) since nature is not in the habit of giving us something for nothing,name some disadvantages of moving an object up a ramp instead of lifting it vertically upward
b) since nature is not in the habit of giving us something for nothing,name some disadvantages of moving an object up a ramp instead of lifting it vertically upward
a)The most important advantage is that we can use a smaller force to move it by a ramp than to lift it vertically.(最重要的优点在于利用斜坡我们可以用更小的力.)
b)The most important disadvantage is that we need more energy to finish the entire process.Because the friction consumes more energy.（最重要的缺点在于利用斜坡耗费了更多的能量来完成整个过程.因为摩擦力消耗了更多的能量）
b)The most important disadvantage is that we need more energy to finish the entire process.Because the friction consumes more energy.（最重要的缺点在于利用斜坡耗费了更多的能量来完成整个过程.因为摩擦力消耗了更多的能量）
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