Name: TED-ED】グリッドアイアン物理学。スカラーとベクトル - ミシェル・ブキャナン (【TED-Ed】Gridiron physics: Scalars and vectors - Michelle Buchanan)
Uploaded: 2021-01-14T04:50:23.000Z
Duration: 4 min 49 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

they've gotta have a play as time's ticking away

転換語

because they've got to stay in this ball game,

Defense looks like they're gonna to man up with no safety.

This is the exact offensive match-up that they want:

the best receiver lined up against the linebacker.

Quarterback steps back to receive the ball,

He's got the inside receiver making a cut.

Receiver is out in front of the defender.

specifically the differences between scalars and vectors.

"Quarterback steps back to receive the ball,

See, measurements are defined as two different quantities.

Scalars are measurements with only numbers,

and vectors are measurements with direction.

For example, when that quarterback takes the snap,

so the five yards by itself is a scalar quantity.

He plants his back foot, he's looking for an opening.

Here's a difference between distance and displacement.

When the quarterback makes a three-step drop,

When he moves about another three yards forward,

so that quarterback moves a total distance of six yards.

describing about how far out of place the object is.

So the quarterback dropped back three yards

he's in the exact same place where he started.

"Quarterback has a beat on it, he let's the ball go!

Receiver is out in front of the defender."

So, speed is measurement without direction,

This takes the receiver 5 seconds to run those 50 yards.

he only goes 35 yards in those 5 seconds,

so his average speed is only 7 yards/second.

They're both traveling in a forward direction,

You can't go from resting to your peak speed immediately.

字幕リスト動画再生

TED-ED】グリッドアイアン物理学。スカラーとベクトル - ミシェル・ブキャナン (【TED-Ed】Gridiron physics: Scalars and vectors - Michelle Buchanan)

ultimately

eventually

effort

average