Newton's Law of Motion
What is Newton's first law of motion? Provide an example.
An object stays still or keeps moving unless something stops or starts it. Example: A ball on the ground stays there until kicked.
Inertia of rest (stays still until something moves it).
Inertia of motion (keeps moving until something stops it).
Inertia of direction (keeps going in the same direction unless redirected).
What is the definition of quantitative observation and an example?
An observation that uses numbers. Example: The ball weighs 2 kg.
What is the definition of Gravity?
Gravity is the force that pulls objects towards the surface of the Earth.
A person parachuting falling at a constant speed is an example of a balanced or unbalanced force?
Balanced Force
What is Newton's second law of motion?
The harder you push something, the faster it moves. Example: Pushing a light box makes it move faster than a heavy one.
T or F: The landing of an aircraft is an example of inertia of direction.
False - Inertia of motion
What is the definition of a qualitative observation and an example?
An observation that uses descriptions. Example: The ball is red.
What is the definition of friction?
Friction is a force that slows things down when they rub against each other.
How can friction be reduced?
Use smoother surfaces or add something slippery, like oil.
What is Newton's third law of motion?
For every action, there’s an equal and opposite reaction. Example: When you jump, the ground pushes you up.
T or F: An umbrella protecting you from the rain is an example of inertia of motion.
False – It’s an example of inertia of direction
What can you use to make quantitative observations?
Rulers, scales, or measuring cups.
What is the definition of force?
a push or pull upon an object resulting from the object's interaction with another object.
True or False: Friction is a force that acts in a parallel direction of movement.
False – Friction acts in the opposite direction of movement.
Aiden kicking a soccer ball is an example of what law of motion?
Determine the type of inertia for the example
The trick of pulling a tablecloth without disturbing the glass of water on the table.
Inertia of rest
What can you use to make quantitative observations?
Eyes, nose, or ears.
What is the definition of magnetism?
Magnetism is the force that makes magnets stick to some metals.
Fill in the blank (movement or no movement): Balanced forces occur when two forces push or pull in opposite directions and it results in ____. Unbalanced forces occur when two forces push or pull and one is stronger than the other, and it results in _____.
Balanced forces result in no movement.
Unbalanced forces result in movement.
Blowing up a balloon and releasing it before you can tie a knot is an example of which law of motion?
Newton's 3rd law of motion
What is the definition of inertia?
The tendency of objects to keep doing what they’re already doing (staying still or moving).
Determine if these examples are qualitative or quantitative observations:
The mass of the computer is 1.3kg.
It is light green in color.
One branch is 3 ft long.
Quantitative: The mass of the computer is 1.3 kg.
Qualitative: It is light green in color.
Quantitative: One branch is 3 ft long.
What are the definitions of rotation and revolution?
Rotation: When something spins around itself (like Earth spinning on its axis).
Revolution: When something moves around another object (like Earth moving around the Sun).
Xavi and Bianca are playing tug-of-war with a rope. Bianca is pulling the rope to the right with a force of 30 Newtons, while Xavi is pulling it to the left with a force of 45 Newtons.
Question: What is the net force on the rope, and in which direction will it move?
The net force is 15 Newtons to the left.