We've talked about linear momentum -- and how it's equal to an object's mass times its velocity.

我们之前讲过线性动量， 它如何等于物体的质量乘以它的速度。

Momentum is often described as an object’s tendency to remain in motion, but technically, it’s an object’s mass times its velocity.

动量通常被描述为物体保持运动的趋势， 但从技术上讲，它是物体的质量乘以其速度。