1. Gravity

2. Gravity- the force that every object exerts on another object. Gravity- the force that every object exerts on another object. Ex: When you fall and hit the ground…you go “Boom.”

3. The amount of gravity between objects depends on 2 things. Mass of the objects Mass of the objects Distance between the objects. Distance between the objects.

4. Weight- the measure of the force of gravity on an object. Weight- the measure of the force of gravity on an object. -More mass = more weight Weight is measured in 1.Newtons (N)…Metric system Weight is measured in 1.Newtons (N)…Metric system 2.Pounds (lbs)…English system

5. To calculate weight in lbs. To calculate weight in lbs. __lbs. X force of gravity = __lbs. Ex: How much would a 100 lb. person weight on Jupiter which force of gravity is 2.64? 100lbs. X 2.64 = 264 lbs. 100lbs. X 2.64 = 264 lbs.

6. To calculate weight in Newtons To calculate weight in Newtons ___kg X force of gravity = ___N Ex: How much would a 100 kg person weigh in Newtons on the moon which has a force of gravity of 1.6 N/kg? 100kg X 1.6 N/kg = 160 N 100kg X 1.6 N/kg = 160 N

7. To calculate weight in Newtons when your starting weight is lbs. To calculate weight in Newtons when your starting weight is lbs. ___lbs / 2.2 = _____kg ___kg X force of gravity = ___N

8. Ex: How much would a 100 lb. person weigh in Newtons on Earth which has a force of gravity of 9.8 N/kg? 100lbs. / 2.2 = 45 kg 100lbs. / 2.2 = 45 kg 45 kg X 9.8 N/kg = 441 N 45 kg X 9.8 N/kg = 441 N