PHYSICS GRADE 7 FORCES AND ACCELERATION

Physics

1 answer:

aleksandrvk [35]3 years ago

3 0

Force is simply a push or a pull exerted on an object in order to change the motion of the object. ... Force can change the acceleration of an object. This acceleration can be a change in speed or direction of the object.

Scientists express force using a unit called newton (N).In mechanics, acceleration is the rate of change of the

velocity of an object with respect to time. Accelerations are vector quantities (in that they have magnitude and direction). The orientation of an object's acceleration is given by the orientation of the net force acting on that object.

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According to Newton's law of Gravitation, the force $F$ exerted between two bodies of masses $m1$ and $m2$ and separated by a distance $r$ is equal to the product of their masses and inversely proportional to the square of the distance: