2 Balanced vs. Unbalanced Forces Force = the cause of acceleration or change in velocity.Net Force = combination of all the forces acting on an object.Balanced - combined forces acting on an object that produce a net force equal to 0.Unbalanced - combined forces acting on an object that produce a non-zero net force.
3 Gravity Is an attractive force that acts between any two objects. Examples:Between the Earth and MHS.Between The Earth and you.Between you and the person sitting next to you.The greater the mass of an object the greater is gravitational attraction.
4 “Mass” Is referred to as the amount of matter in an object. Ex: Mrs. Barkus’ mass is about 67 kilograms.
5 “Free Fall Acceleration” Occurs when the force of gravity is the only force acting on an object.In absence of air resistance, all objects near the earth’s surface accelerate at a rate of 9.8 m/s2.Gravity (g) = 9.8 m/s2
6 WeightWeight is the gravitational force an object experiences due to its mass.Your weight is the product of your mass (m) and the pull of gravity (g).W = mgWeight = mass x free-fall acceleration.Ex: Mrs Barkus’ weight = 67 kg x 9.8 m/s2. This equals 657 N.
7 How would this affect us if… What would have happened if it wasn’t Earth that became habitable. What if it was a different planet?How would this have affected are ability to do things...like jump?