Gravity
The force that pulls all objects towards the earth.
What is Gravity
The friction force caused by air pushing back on a moving object.
What is air resistance?
A body in space that orbits a larger body (like the Moon orbiting Earth).
What is a Satellite?
The support force a table exerts upwards on a book resting on it.
What is a normal force?
The force that water exerts upwards against the weight of an object.
What is upthrust?
What Marcus is using when he pushes a table (as opposed to a pull).
What is a push?
Zara pulling a door closed or Marcus pushing a table.
What is an applied force?
Man-made satellites designed by scientists to orbit the Earth.
What are Artificial Satellites?
The two things that affect the amount (strength) of gravity between two objects.
What is the size of the objects (mass) and the distance between them?
What happens to an object if its weight is greater than the upthrust.
What is "it sinks"?
A machine or machine part can also do this to an object.
What can apply a force (besides a person)?
What happens to a parachutist's speed when the parachute opens and air resistance increases.
What is "they slow down" (or decrease in speed)?
The force that keeps an artificial satellite in orbit around the Earth.
What is Gravity?
This is what we know about the size of the arrows for gravity and normal force when a book is resting still on a table.
What is "they are the same size" (or they are balanced)?
Why a rubber duck floats on the water (based on upthrust and weight).
What is "the upthrust is equal to or greater than the weight"?
The two things we use to show the direction of forces in a force diagram.
What are arrows?
How a penguin's smooth body shape helps it when it is swimming in the water.
What is "it is streamlined" (or reduces water resistance)?
What provides the power to launch an artificial satellite from Earth into space?
What are rockets?
This is what we know about the size of the arrows for gravity and normal force when a book is resting still on a table.
What is "they are the same size" (or they are balanced)?
Why the forces pushing up at the bottom of the duck are larger than the forces at the top.
What is because the water pressure is greater at the bottom?
Why the downward arrow for gravity is the exact same size as the upward arrow for normal force on a book laying on a table.
Why are the forces equal and opposite? (Or: Why does the book not move?)
The two forces balancing each other out when a parachutist falls at a steady speed.
What are gravity and air resistance?
What scientists do on the International Space Station and where they use their findings.
What is carry out investigations and find images and findings back to earth?
The reason the Earth exerts a greater force of gravity on the Moon than the Moon does on the Earth.
Why is the Earth's gravity stronger?
The rule for an object to float in terms of weight and upthrust.
What is "the upthrust is equal to or greater than the weight"?