Gravity is a natural force that pulls all objects toward the center of the Earth. Gravity has a stronger force on objects with greater mass, so while a bouncy ball and marble fall at the same rate of speed due to gravity, the marble experiences a harder fall due to its greater mass. Gravity also requires the application of greater force to overcome for objects with higher mass, as it is harder to throw a basketball into the air than a bean bag due to the basketball's larger mass.

1. Gravity
What isit?
http://www.fi.edu/pieces/cych/apollo%2010/story/hoi/ball3.htmlhttp://www.fi.edu/pieces/cych/apollo

2. GravityGravity isis……
• A natural force that
pulls all objects
toward the center of
the earth.

3. WHAT ISA FORCE?
A pul l or a
push on an
obj ect

4. Which do you think would fall first?
• A bouncy ball
Or a marble
Try It!

5. They fall at the same rate of speed,
but the marble has more mass
(weight) and so gravity makes it fall
harder!
Gravity has a stronger force on
things with more mass!

6. It takes a force to overcome gravity!
Throw a bean bag in the air
and then…
Throw a basketball in the air.
Which one was
harder to throw?

7. • You had to use more force
to throw the basketball
because it has more mass
(weight)