Hooke's Law
A spring force always points in this direction relative to the object’s displacement from equilibrium.
What is opposite of the displacement?
According to Kepler’s First Law, planets move around the Sun in this shape
What is an ellipse?
Finish the phrase: "An object in motion stays in motion and an object at rest..."
What is "stays at rest unless acted on by an unbalanced, non-zero net force"?
What is the Formula for Newton's 2nd Law?
What is, F=ma?
Newton’s Third Law says that for every action force, there is this type of reaction force.
What is an equal and opposite reaction force?
This variable represents the stiffness of the spring. A larger value means the spring is harder to stretch.
Kepler’s Second Law says a planet sweeps out equal areas in equal times, meaning a planet moves fastest at this point in its orbit.
What is the perihelion?
If the net force on an object is zero, the object’s velocity will do this.
What is stay constant?
Newton's 2nd Law states that acceleration happens when...
What is a non-zero net force that acts on a mass?
Action-reaction forces do not cancel each other out because they act on this.
What are different objects?
A spring has a spring constant of 200 N/m and is stretched 0.10 m. This is the magnitude of the spring force.
What is 20 N?
According to Kepler’s Third Law, the square of the orbital period, T, is proportional to this power of the semi-major axis, a.
What is the third power?
This property of matter, quantified by inertial mass, explains why an object sliding, without slipping, on a frictionless surface maintains constant velocity in the absence of a net force.
What is Inertia?
A 5 kg object experiences a net force of 20 N. This is its acceleration.
What is 4 m/s^2
Newton's third law is directly correlated to this conservation law; in an isolated two-body system, equal and opposite impulses ensure that the total value of this quantity remains unchanged.
What is conservation of linear momentum?
If there are 2 identical springs, and one spring is stretched twice as far from equilibrium compared to the other, this happens to the magnitude of the restoring force.
What is it doubles?
If two planets orbit the same star, the planet with the larger orbital radius will differ in orbital period in this way.
What is a longer orbital period?
What is another name for Newton's 1st Law?
What is the Law of Inertia?
If the net force on an object doubles while its mass stays the same, this happens to its acceleration.
What is it doubles?
A book rests on a table. Earth pulls downward on the book with gravity. Newton’s Third Law reaction force is this force.
What is the book pulling upward on Earth with gravity?
A spring with spring constant, k, is stretched from x to 2x. Compared to the original elastic protetial energy, the new elastic potential energy is this many times larger.
What is 4 times larger
A planet has an orbital radius 4 times Earth’s orbital radius. This is its orbital period in Earth years.
What is 8 years?
A person stands in an elevator moving upward at constant speed. A student says the normal force must be greater than the person’s weight because the elevator is moving upward. This is the mistake in the student’s reasoning.
What is confusing velocity with acceleration?
Two blocks of masses m and 2m are touching on a frictionless table. A horizontal force F pushes the blocks together so they accelerate as one system. In case A, F is applied to the m block. In case B, F is applied to the 2m block. This is the ratio of the contact force in Case A to the contact force in Case B
What is 2:1?
A horse pulls forward on a cart, and the cart pulls backward on the horse with an equal force. Even though these forces are equal and opposite, the horse-cart system can still accelerate forward because the external force responsible for the forward acceleration is this.
What is the forward friction force from the ground on the horse?