acceleration

• In the course of time positive and negative acceleration impulses tend to cancel one another .
  在长时间中，正向和反向加速度冲击有互相抵消的趋势。
• In every case, then the vector force equals the product of the mass and vector acceleration .
  因此在所有情况下，力矢量等于质量和加速度矢量的乘积。
• Let us trace out in greater detail this computation of acceleration due to gravitational forces .
  让我们详细追查这些由重力所引起的加速度的计算方法。
• Enrichment of the mixture during acceleration is shown by the two peaks at about 23mph and 40mph .
  加速时混合气的加浓用两个尖峰表示，大约是23mph和40mph。
• The acceleration may in turn be obtained from the velocity of the satellite and the radius of the orbit .
  这个加速度又可根据卫星的速度和它的轨道半径来求得。
• For smaller vehicles with high acceleration the wind may be little concern with structural loads .
  对于具有高加速度的小型飞行器，风与结构载荷的关系可能不大。
• Acceleration always has the direction of the net force, regardless of the direction of the velocity .
  加速度的方向总是与净外力的方向一样，而与速度的方向无关。
• The most common example of motion with (nearly) constant acceleration is that of a body falling toward the earth .
  最普通的匀加速（近似）运动的例子，是落体运动。
• For a rigid body rotating about a principal axis, the angular acceleration is related to torque by t =ia .
  对于绕主轴转动的刚体来说，角加速度与转矩的关系是TIa。