3 Physical Science Force and Motion

FORCE AND MOTION Systems check! Ready for blast off. Hey! I'm Motion! 3, 2, 1... Hey?! What's the big idea? Huh? Sorry! I wasn't paying attention.

力和运动系统检查！准备发射。 嘿!我运动了!3,2,1… 嘿? !这有什么了不起的？ 嗯?对不起!我没注意。

Come on! We're a team here! Objects don't just start moving on their own. You're right! You need me! I'm Force! And together- We're force and motion!

来吧!我们是一个团队！物体不会自己开始移动。 你是对的!你需要我！我力量!我们是力量和运动！

WHAT IS A FORCE? A force is a push or a pull. It can be as small as a nudge or as big as a shove. When I kick this ball... That's where I come in. AHHH!

什么是力？力是推或拉。 它可以小到轻推，也可以大到推。 当我踢这个球时…这就是我的切入点。 啊!

A mechanical force acts when two objects touch each other. My foot touched the ball. But some forces affect objects without physically touching them. These forces are invisible. One such force is gravity. Hi. Gravity is the force that pulls everything... ...down to the ground! We get it.

当两个物体相互接触时，就会产生机械力。 我的脚碰到了球。但有些力对物体产生影响，却没有物理接触。 这些力量是看不见的。 其中一种力就是重力。 嗨。重力是拉动一切的力…… …趴在地上！我们明白了。

FORCES ALL AROUND US There are many forces around you every day. Look at this bulldozer! That's a mechanical force at work. That's a lot of force!

我们周围的力量每天都有许多力量围绕着你。 看这台推土机！这是一种机械力在起作用。 这是很大的力量！