UC知道物理课的问题，英文的
来源：百度知道 编辑：UC知道 时间：2024/05/24 04:34:22
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）