The slant of the roof is too steep to climb.

屋顶的太陡无法攀爬。

And when the block was stationary, we said there must be an offsetting force.

力也就是49牛沿上的摩擦力，力也就是49牛沿上的摩擦力。

And a sloper is like a very sloping hold.

就是一非常倾的着力点。

Someone please show me a proper sloper technique.

请来人给我展示一正确的技术。

There are six basic types of simple machines, starting with the inclined plane.

简单机器有六基本类型，先从开始介绍。

The last stage is honing and putting a very fine edge or bevel.

最后一步是用磨刀石磨，继而得到光滑的边缘或。

You might guess what it's called.

力，也就是平行於的地心引力的分力。

And so this is 49 square roots of 3 newtons out of the surface, out of the surface.

力，也就是平行於的地心引力的分力力，也就是平行於的地心引力的分力。

We broke up the force into kind of the perpendicular direction and the parallel direction.

力，也就是平行於的地心引力的分力力，也就是平行於的地心引力的分力。

And this is the normal force.

力，也就是平行於的地心引力的分力。

The function of pyramids changes between groups and cultures, and often they will be stepped rather than flat-sided.

金字塔的功能因群体和文化的不同而不同，它们通常是阶梯式的，而不是有着平滑的。

So you have this counteracting normal force.

力，也就是平行於的地心引力的分力。

But thanks to our skillful coxswain, we were fouled on the bias rather than broadside, so we didn't capsize.

水必须排出去。由于艇长的机灵，艇身只是的而不是正的受到海马攻击，所以没被憧翻沉没。

The scientists used high-speed video cameras to record the position of the snakes as they moved sideways up different inclines.

科学家使用高速摄像机记录蛇在不同上升时的位置，运动叫蛇形。

" This is called an inclined plane, " he said.

“叫做，”他说。

The massive ball rolls slowly down the inclined plane.

1. 大球沿着缓慢滚动。

Now what other forces do we have?

力，也就是平行於的地心引力的分力？

But the rest of it fitted intothe cant well enough.

但它的其余部分很适合。

He stood bowed over the inclined plane with the marble again.

他再次弯下腰站在有大石的上。

Well, we have the force that's parallel to the surface.

力，也就是平行於的地心引力的分力。