Gravity - Rate of Fall - Graphing Gravity
- 2. WHAT KEEPS EARTH IN ORBIT AROUND THE SUN?
- 3. What stops a body from streaming off into outer space? GRAVITY To understand gravity let’s take a look at the past… GRAVITY Sir Isaac Newton was the first person to hypothesize that the force that pulls an apple to the ground was the same force that pulls the moon toward Earth, and it is this force that keeps big objects like the Moon and Earth in orbit (along with inertia).
- 4. Elegant Universe – Gravity’s Story! But if gravity makes things fall or attracted to other objects…how exactly does gravity work?
- 5. The Universal Law of Gravity is the force of attraction between all objects in the universe. GRAVITY Why? Because all objects have MASS. How? By bending the space time fabric The more massive the object, the more it bends. It is this bend in space time that we feel as gravity. Measured in Newton’s “g” on Earth accelerates at 9.8m/s2
- 6. DRAW A PICTURE OF HOW GRAVITY WORKS?
- 7. LAB – GRAVITY AND RATE OF FALL
- 8. LAB – GRAVITY AND RATE OF FALL #1 #1 #1 #4 All objects fall to the ground at the same rate, the flat paper took a longer time to reach the ground because of air resistance. Only the uncrumpled (flat) paper Air resistance slowed down the flat uncrumpled paper
- 9. Yes – Take away air resistance and each item would hit the ground at the same time. Air resistance was no longer a factor slowing down the paper. They would hit the ground at the same time because all objects fall on Earth at 9.8 m/s/s. #1 #1 #1 #4
- 10. GRAPHING THE LAW OF GRAVITY
- 11. GRAPH 1 - GRAVITY VS. MASS
- 12. GRAPHING THE LAW OF GRAVITY
- 13. GRAPH 2 - GRAVITY VS. DISTANCE
- 16. STRENGTH OF GRAVITY What determines the strength of gravity? MASS – The product of masses between two objects. DISTANCE – The distance squared between two objects.
- 18. STRENGTH OF GRAVITY The force of gravity increases as the mass of the objects increase. (Direct Proportion) 0 200 400 600 800 1000 1200 1400 1600 1800 2000 0 10 20 30 40 GravitationalForce(Newtons) Distance Squared Between Planets (km squared) Gravitational Force vs. Distance Squared 0 500 1000 1500 2000 2500 0 200 400 600 800 GravitationalForce(Newtons) Product of Planet Masses (kg) Gravitational Force vs. Product of Masses Gravity decreases as the distance between two objects increase. (Indirect Proportion).
- 19. Mass- is the amount of matter in an object Weight- is the force of gravity on an object The greater the mass the greater the force (weight) MASS VS. WEIGHT
- 20. FREE FALLING – NOW I’m Free Falling All objects, no matter their mass, fall to Earth at a rate of 9.8 m/s² HOWEVER, Air resistance can cause some objects to reach their terminal velocity. FREE FALL ON THE MOON
- 21. THE FEATHER ON THE MOON!
- 22. STUDENT DROPS
- 23. STUDENT DROPS