力学英语求解释.Newton's second law of motion states that the force needed to accelerate a particle is equal to the product of the mass of the particle and the acceleration produced.The unit of force is the newton(N).It is defined as the force

力学英语求解释.Newton's second law of motion states that the force needed to accelerate a particle is equal to the product of the mass of the particle and the acceleration produced.The unit of force is the newton(N).It is defined as the force
力学英语求解释.
Newton's second law of motion states that the force needed to accelerate a particle is equal to the product of the mass of the particle and the acceleration produced.
The unit of force is the newton(N).It is defined as the force that will cause a mass of 1 kg to accelerate at a rate of 1 m/s^2
you usually resolve in the direction of the acceleration and perpendicular to the direction of the acceleration.
the normal reaction is the force which acts perpendicular to a surface when an object is in contact with the surface.In the example on the previous page,the normal reaction is equal in magnitude to the weight of the book.

力学英语求解释.Newton's second law of motion states that the force needed to accelerate a particle is equal to the product of the mass of the particle and the acceleration produced.The unit of force is the newton(N).It is defined as the force
Newton's second law of motion states that the force needed to accelerate a particle is equal to the product of the mass of the particle and the acceleration produced.
牛顿第二定律指：使质点加速的力等于质点的质量乘以力所产生的加速度.也就是F=ma
The unit of force is the newton(N).It is defined as the force that will cause a mass of 1 kg to accelerate at a rate of 1 m/s^2
力的单位是牛顿N,1N等同于使1kg的物质产生1m/s^2的加速度时所用的力.
you usually resolve in the direction of the acceleration and perpendicular to the direction of the acceleration
我们通常（将力）分解为一个加速度方向的力和一个垂直于加速度方向的力.
the normal reaction is the force which acts perpendicular to a surface when an object is in contact with the surface.In the example on the previous page,the normal reaction is equal in magnitude to the weight of the book
反作用力垂直于物体的接触面,在前页的例子中,反作用力的大小等于书地重力.

牛顿第二运动定律表面，使物体加速所需的力，等于物体的质量乘以该物体的加速度。
力的单位是牛顿（N），定义为：使质量为1kg的物体，获得1米/秒平方的加速度所需要的力。
通常，你可以把力分解为与加速度同方向，以及与加速度垂直的方向。
正常的反作用力如：当物体和表面接触时，将获得一个与表面垂直的支持力。如前页的举例，正常的反作用力的大小和书的重力大小相等（方向相反）。...

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牛顿第二运动定律表面，使物体加速所需的力，等于物体的质量乘以该物体的加速度。
力的单位是牛顿（N），定义为：使质量为1kg的物体，获得1米/秒平方的加速度所需要的力。
通常，你可以把力分解为与加速度同方向，以及与加速度垂直的方向。
正常的反作用力如：当物体和表面接触时，将获得一个与表面垂直的支持力。如前页的举例，正常的反作用力的大小和书的重力大小相等（方向相反）。

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