1. Sci. 2-1
Gravity and Motion
Pages 36-42

2. A. All objects fall with the same acceleration
A. All objects fall with the same acceleration. Mass does NOT affect the rate at which it falls.

3. All objects accelerate toward Earth at a rate of 9.8 m/s/s.
V=9.8 m/s/s x ___s
V= g x t

5. A penny takes 3 seconds to hit the ground.
V=9.8 x 3 = 29.4 m/s down

6. D. Air Resistance (Fluid Friction) slows down acceleration because air resists the surface of the falling object.

7. E. Terminal Velocity- the constant velocity of a falling object when the size of the upward force of air resistance matches the size of the downward force of gravity.

8. F. Free Fall- only truly happens when there is no air resistance (in a vacuum). Feather and Apple fall with the same acceleration.

9. G. Orbit- to go around something in a nearly circular path.

10. H. Centripetal force- the force that causes objects to move in a circular path.

11. I. Projectile Motion- 2 parts- horizontal velocity and vertical velocity which causes a curved path