First Law Fundamentals
The term for an object’s tendency to resist changes in its motion.
What is inertia?
Newton’s Second Law can be defined as this formula.
What is F = ma?
Newton’s Third Law states that for every action, there is this.
What is an equal and opposite reaction?
This type of force opposes motion between surfaces in contact.
What is friction?
Seatbelts protect passengers by keeping them in place according to this law of motion.
What is Newton’s First Law?
An object at rest stays at rest unless acted upon by this.
What is an unbalanced net force?
The net force that acts on a 10 kg object accelerating at 2 m/s².
What is 20 N?
When a person jumps off a diving board they push down on the diving board, this force propels them upward.
What is the board pushing up on them?
This force acts perpendicular to a surface to support an object’s weight.
What is Normal Force?
Heavier cars require more of this than lighter cars to achieve the same acceleration.
What is force?
A hockey puck slides on ice and eventually slows down due to this force.
What is friction?
Doubling the mass of an object while keeping the same force results in this change to its acceleration.
It is halved.
A rocket lifts off because the expelled gases produce this reaction force.
What is the rocket being pushed upward?
A swing hang from a tree. The force acts through the chain.
What is Force of Tension?
Swimmers move forward because they push water backward, demonstrating this law.
What is Newton’s Third Law?
When a car moves at a constant speed in a straight line, the forces acting on it are considered this.
What is balanced or net force is zero?
A cart accelerates at 2 m/s² when pushed with a 50 N force; this is the cart’s mass.
What is 25 kg?
A swimmer moves forward in water because they push water backward and experience this.
What is a forward reaction force?
Friction acting on falling objects is also called this.
What is air resistance?
Brakes convert the kinetic energy of a bike into this type of energy, causing them to get hot.
What is thermal energy?
Astronauts float inside the International Space Station using Newton’s First Law due to this phenomena.
What is free fall?
Pushing a loaded truck is harder than an empty one because a larger mass requires this to achieve the same acceleration.
What is a larger force?
Walking involves this principle, where your foot pushes backward on the ground and the ground pushes forward on your foot.
What is Newton’s Third Law?
A 5 kg box is pulled with 20 N across a floor with 5 N of friction, producing this acceleration.
What is 3 m/s²?
Rockets launch in space because expelling gases backward produces this, even in a vacuum.
What is a forward reaction force?