Name: 三個不正確的運動規律 (Three Incorrect Laws of Motion)
Uploaded: 2021-01-14T10:51:22.000Z
Duration: 2 min 29 s
Description: 【看影片學英語】數萬部 YouTube 影片，搭配英漢字典即點即查，輕鬆掌握單字發音與用法，長久累積看電影不必再看字幕。

程度副詞

Nearly 350 years ago, Isaac Newton came up with three laws of motion that govern how everything moves.

There are three pretty famous laws of motion.

情態副詞

And they're not very complicated, but if I told them to you as clearly as I can,

You would think that you're understanding them, but I think you wouldn't.

And the reason is, everyone has ideas about physics and how objects move,

Before they're ever taught anything in, uh, a science classroom.

So rather than tell you Newton's Three Laws of Motion, I like to tell you

Derek's Three Incorrect Laws of Motion, which are the ones I think you're actually thinking.

So, Derek's First Incorrect Law of Motion is...

An object with no unbalanced forces on it will naturally come to rest.

Derek's Second Incorrect Law of Motion is that an unbalanced force causes

An object to move with a constant velocity

Where the unbalanced force, F, equals the mass (M)

So, if you double the force, the velocity also doubles.

As you press on the accelerator, you increase the force on the car,

and therefore, you move to a new, higher constant speed.

Derek's Third Incorrect Law of Motion is that

Larger objects apply larger forces to smaller objects.

When a large truck slams into a car on the highway,

The force of the truck on the car is much greater than the force of the car back on the truck.

Or you think about the Earth and the Moon.

The force with which the Earth attracts the Moon is greater than the force with which the Moon attracts the Earth.

But remember, this is an incorrect law of motion.

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三個不正確的運動規律 (Three Incorrect Laws of Motion)

constant

force

express

increase