Newton's 3 Laws of Motion
This law states that an object at rest stays at rest and an object in motion stays in motion unless acted upon by an unbalanced force.
What is Newton's First Law of Motion (or Law of Inertia)?
This type of friction opposes the motion of an object that's already moving.
What is kinetic friction?
This term describes the force exerted by a supporting surface on an object in a gravitational field.
What is apparent weight?
This law states that the force exerted by a spring is directly proportional to its displacement from equilibrium.
What is Hooke's Law?
This scientist formulated the law of universal gravitation in the late 17th century.
Who is Isaac Newton?
According to this law, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
What is Newton's Second Law of Motion?
This type of friction must be overcome to start an object moving from rest.
What is static friction?
When in free fall, an object's apparent weight becomes this value.
What is zero (or weightless)?
In the equation F = kx, this variable represents the spring constant.
What is k?
According to Newton's law, the gravitational force between two objects is inversely proportional to this.
What is the square of the distance between their centers?
This law is often summarized as "For every action, there is an equal and opposite reaction."
What is Newton's Third Law of Motion?
The force of friction is always parallel to this.
What is the surface of contact (or the surface the object is moving on)?
The equation Fapp=m(g±a) represents this concept, where g is the acceleration due to gravity, m is mass, and a is acceleration.
What is apparent weight?
This is the amount of force exerted by a spring with a spring constant of 5 N/m when stretched 3 cm.
What is 0.15 N
In the equation F = G(m₁m₂)/r², G represents this constant.
What is the gravitational constant?
If you're sitting in a car and it suddenly stops, your body continues moving forward due to this property described in Newton's First Law.
What is inertia?
This dimensionless quantity represents the amount of roughness between two surfaces.
What is the coefficient of friction?
An astronaut on the International Space Station experiences this type of apparent weight due to being in constant free fall around Earth.
What is weightlessness (or zero apparent weight)?
When a mass is hung by a spring, this is the force that causes the spring to stretch and is equal to the spring force.
What is the force due to gravity
The gravitational force between two objects increases by this factor when both masses are doubled in magnitude while keeping their distance apart the same.
What is by a factor of 4?
This equation is the mathematical representation of Newton's Second Law of Motion.
What is F = ma?
This is the amount of force required to push a 40 kg box along the floor with an acceleration of 2 m/s2. The box and the floor have a coefficient of kinetic friction of 0.25.
What is 180 N
In an elevator accelerating upward at 2 m/s², a 70 kg person's apparent weight would be this many newtons (g ≈ 10 m/s²).
What is 840 N?
A 0.5 kg mass attached to a spring with spring constant stretches 0.1 m. What is the spring constant?
What is 50 N/m?
Calculate the gravitational force between two objects with masses 5 × 10⁴ kg and 2 × 10⁵ kg, separated by 10 meters. Use G = 6.67 × 10⁻¹¹ N·m²/kg².
What is 0.0667N?