Newton's Laws
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?
The lack of this force makes objects appear to be weightless when in free fall.
What is the normal force?
This type of friction opposes the motion of surfaces sliding against each other.
What is kinetic friction?
This type of force is always directed toward the center of a circular path.
What is centripetal force?
This fundamental force attracts any two masses in the universe towards each other.
What is gravity?
The equation F = ma represents this law of motion.
What is Newton's Second Law of Motion?
The apparent weight of an object in an elevator accelerating upward is this when compared to their normal weight. (Greater than, less than, or equal to)
What is greater than?
The force of friction is always parallel to the surfaces in contact and perpendicular to this force.
What is the normal force?
The equation F = mv²/r represents this force, where m is mass, v is velocity, and r is radius.
What is centripetal force?
Newton's law of gravitation states that the force of gravity is inversely proportional to this quantity squared.
What is distance?
This law states that for every action, there is an equal and opposite reaction.
What is Newton's Third Law of Motion?
People in the ISS are constantly undergoing this, giving the illusion of weightlessness.
What is free fall?
This variable, represented by μ, determines the strength of the frictional force between two surfaces.
What is the coefficient of friction?
In a car turning a corner, this force provides the centripetal force needed for circular motion.
What is friction?
The equation F = G(m₁m₂)/r² represents Newton's law of gravitation, where G is this number.
What is 6.67 × 10⁻¹¹?
This term describes the tendency of an object to resist changes in its state of motion.
What is inertia?
When an elevator slows down to a stop after moving downward, your apparent weight changes. The other motion that the elevator can do to change your apparent weight in the same way is this.
What is accelerating upwards from rest.
If a 50 kg crate experiences a coefficient of friction of 0.3 on a horizontal surface, the friction force would be this many Newtons.
What is 147 N?
A 0.5 kg object moving in a circle with radius 2 m at 4 m/s experiences this much centripetal force in Newtons.
What is 4 N?
The value of the gravitational constant G is approximately 6.67 × 10⁻¹¹ in these units.
What are N·m²/kg² (Newton-square meters per kilogram squared)?
If a 50 kg object experiences a net force of 100 N, its acceleration will be this many m/s².
What is 2 m/s²?
A 70 kg person in an elevator accelerating upward at 2 m/s² would have this apparent weight in Newtons.
What is 840 N?
If a 50kg box is pushed with a force of 50N and it has a coefficient of static friction with the floor of 0.5, the frictional force is this many Newtons.
What is 50N?
This is a list of the directions of the centripetal force, the centripetal acceleration, and the velocity of an object in uniform circular motion
What is towards the center, towards the center, and tangentially to the circle?
Two 1000 kg masses 10 meters apart experience this gravitational force in Newtons.
What is 6.67 × 10⁻⁷ N?