Forces part 2.

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Presentation transcript:

Forces part 2

As a review..... A force is a push or pull, or any action that has the ability to change motion.

Inertia Resistance of any physical object to any change (motion, speed, velocity, rest). It is a tendency for an object to travel in a straight line at a constant velocity

Force=mass x acceleration Calculating force Calculating the force of an object we need its Mass and acceleration Force=mass x acceleration F= m x a

Calculating Acceleration acceleration = Vf-Vi time like = mph/seconds

Gravity and Weight The force of gravity on an object is called weight. Mass and weight are not the same thing! (Mass = how much stuff) (Weight = the force of gravity pulling on that stuff)

Weight A 10-kilogram rock has a mass of 10 kilograms no matter where it is in the universe. A 10-kilogram rock’s weight however, can vary greatly depending on where it is.

2 rules for gravity.... Bigger objects have a stronger gravitational force Closer objects have a stronger gravitational force

Terminal velocity Terminal velocity = point you stop accelerating to earth as you fall down Gravity accelerates you towards the earth but the air pushes you back up creating drag. Terminal velocity= 54 meters/second