Air
What is air resistance? (At least 1 explanation)
•Air resistance also known as drag is a force that slows down moving objects.
•It is created by millions of tiny air particles hitting the object as it moves through them and pushes them aside.
•It acts in the opposite direction to the movement.
What is gravity? (At least 1 explanation)
What are Isaac Newton's three laws of motion? (Must have all 3 laws)
What is Buoyancy Force?
Buoyancy is the floating force.
What is a force?
A force is a push or pull upon an object.
Air resistance produces heat True/False
True
What is a contact force and a non-contact force?
What is the first law and what is the meaning?
First Law (Inertia): An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
True or False:
If the objects weight is greater than the buoyant force, it will sink.
True
What are forces measured by?
Newtons (N)
Is air resistance a problem?
Air Resistance (drag) is a problem for moving objects such as race cars, cyclist or Olympic athletes – Anyone trying to move fast through air.
Why is gravity on the moon one sixth of the Earth's gravity?
The moon is so much smaller.
What is the second law and what is the meaning?
Second Law (Force and Acceleration): The acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to its mass
True or False:
The water that has been displaced (pushed out of the way) cannot push back on the object.
False
The water that has been displaced (pushed out of the way) pushes back up on the object.
How can forces be represented as?
Arrows
How to reduce air resistance for a train or bus?
Changing the shape:
-A tall, wide Object has a big area for lots of air particles to bump into.
-Making the shape shorter and narrower will decrease the air resistance.
-A point or edge at the front will help the object cut through the air.
Why does weight change on other planets?
●Your weight changes on different planets because the strength of gravity varies depending on the mass and size of the planet.
●Smaller planets have weaker gravity, leading to lesser weight, while larger planets have stronger gravity, leading to greater weight.
What is the third law and what is the meaning?
Third Law (Action-Reaction): For every action, there is an equal and opposite reaction.
What is elasticity?
Elastic materials are ones that return to their original shape when stretched (pulled out) or compressed (pushed in).
What can cause an object to start moving, stop moving, change direction, or change its shape?
Forces
How to increase air resistance?
•Air resistance is increased by enlarging the area of the object in contact with the air.
•This slows the object down.
Complete this sentence:
A black hole is a region of space where the _______ of gravity is so strong that everything, including _____, is pulled into it and cannot escape!
- force
- light
What is an example of the third law? (draw and explain)
Teacher discretion
What is tension?
The state of being stretched out.
Tension is a pulling force that acts along the length of an object, like a rope being stretched.
Draw the two forces of a rocket on your board
Teacher discretion