Newton's second law of motion - Revision history

Vipul: /* External links */

2010-06-20T01:22:59Z

External links

← Older revision		Revision as of 01:22, 20 June 2010
Line 21:		Line 21:
	===Instructional video links===		===Instructional video links===

	* [http://www.animations.physics.unsw.edu.au/mechanics/chapter5_Newton.html] -- choose and play Section 5.2		* [http://www.animations.physics.unsw.edu.au/mechanics/chapter5_Newton.html Physclips by University of New South Wales] -- choose and play Section 5.2

Vipul at 01:16, 20 June 2010

2010-06-20T01:16:16Z

← Older revision		Revision as of 01:16, 20 June 2010
Line 16:		Line 16:

	<math>I = p_2 - p_1</math>.		<math>I = p_2 - p_1</math>.

			==External links==

			===Instructional video links===

			* [http://www.animations.physics.unsw.edu.au/mechanics/chapter5_Newton.html] -- choose and play Section 5.2

Vipul: Created page with '==Statement== ===In terms of force and acceleration=== The net external fact about::force on a system is the product of the total fact about::mass of the system and the…'

2010-01-20T20:54:06Z

Created page with '==Statement== ===In terms of force and acceleration=== The net external fact about::force on a system is the product of the total fact about::mass of the system and the…'

New page

==Statement==

===In terms of force and acceleration===

The net external [[fact about::force]] on a system is the product of the total [[fact about::mass]] of the system and the [[fact about::acceleration]] of its [[fact about::center of mass]] (here, mass is a scalar quantity and both force and acceleration are vector quantities). In symbols:

<math>\overline{F} = m\overline{a}</math>.

In particular, the direction of the net external force is the same as the direction of acceleration of the center of mass.

For a point mass or particle, we can talk of the acceleration of the whole body, and thus <math>\overline{a}</math> in the above refers to the acceleration of the point mass.

===In terms of momentum and impulse===

The net external [[fact about::impulse]] exerted on a system over a time period equals the difference between the final and initial values of its [[fact about::linear momentum]]. In other words, if the impulse from time <math>t_1</math> to <math>t_2</math> is <math>I</math>, the momentum at time <math>t_1</math> is <math>p_1</math>, and the momentum at time <math>t_2</math> is <math>p_2</math>, then:

<math>I = p_2 - p_1</math>.