Gravity
Bodies in space have a force called________________.
If I see a ball at rest (not moving), and I don't do anything to it, what will the ball do?
Stay at rest (not move).
What is MASS ?
Mass is the amount of MATTER (or stuff) inside of things.
It also has weight.
1) a 100-pound cat, OR
2) a 100-pound dinosaur?
This is a trick question: Neither are heavier. They're both the SAME weight.
What give planets and moons and other bodies in space their gravity?
Their mass (weight) gives them their gravity.
If I throw a baseball in space, what will the ball do?
The ball will stay in motion unless an outside force like gravity affects it.
I have a ball. I throw this ball. It flies only 20 feet.
What do I do to make it fly FARTHER?
1) Apply more MASS, or
2) Apply more FORCE?
Apply more FORCE.
When a bird flaps it's wings. That is an ACTION.
What is the opposite REACTION for the wing?
The air has mass, so it provides an opposite reaction to the wing.
Which Planet has MORE gravity?
1) Earth
2) Mercury
Earth
Talk about objects at REST.
They STAY at rest, unless an outside force affects it.
The force applied and the mass of the object.
Why can't I push the Earth and make it move in space?
The Earth has much more MASS than I do.
Why doesn't the moon fly away from the Earth?
The Earth has more mass than the moon and Earth's gravity keeps the moon in orbit.
It stays in motion unless an outside force affects it.
1) If Person #1 has a big strong arm, and Person #2 has the same big strong arm, who will throw the ball farther: #1, with a bowling ball, or #2, with a golf ball?
2) What makes one of these balls fly farther?
Is it the MASS of the ball or is it the FORCE of the strong arm?
1) Person #1 will throw the golf ball farther.
2) It is the MASS of the ball that makes the golf ball fly farther.
When you fire a cannon ball out of a cannon, what is the ACTION and what is the REACTION?
The ACTION is the cannon ball flying out of the cannon, and the REACTION is the cannon moving backwards.
Who is the person who said that the moon orbits the Earth because the Earth has gravity?
Sir Isaac Newton
If I throw a baseball on Earth, name two forces that will slow down the baseball and make it fall to the ground.
gravity and air resistance.
Name two kinds of FORCE.
Examples: gravity, push force, pull force, twist force, crush force, squeeze force.
I am reading a book about Newton's Third Law of Motion.
What is the genre of this book?
Non-fiction (or informational).
or Expository Non-fiction.