Physics of Coefficient of Restitution

<p>Racquetball (B)</p> Signup and view all the answers

<p>Higher temperature can increase the COR. (B)</p> Signup and view all the answers

<p>Positive Work (A)</p> Signup and view all the answers

<p>A person lowers a box to the floor. (D)</p> Signup and view all the answers

<p>Isometric Contraction (C)</p> Signup and view all the answers

<p>-40 J (D)</p> Signup and view all the answers

<p>Positive Work (D)</p> Signup and view all the answers

<p>The cause-effect relationship between forces and acceleration. (B)</p> Signup and view all the answers

<p>24.81 m/s² upward. (B)</p> Signup and view all the answers

<p>1.5 N. (A)</p> Signup and view all the answers

<p>For every action, there is an equal and opposite reaction. (D)</p> Signup and view all the answers

<p>Velocity. (D)</p> Signup and view all the answers

<p>J = F * t (B)</p> Signup and view all the answers

<p>28 kg⋅m/s (C)</p> Signup and view all the answers

<p>-28 N⋅s (A)</p> Signup and view all the answers

<p>The mass of the body and external forces (C)</p> Signup and view all the answers

<p>-56 N (D)</p> Signup and view all the answers

<p>The shot has a smaller mass than the shot putter (D)</p> Signup and view all the answers

<p>Equal and opposite (C)</p> Signup and view all the answers

<p>Ft = m(v_f - v_i) (D)</p> Signup and view all the answers

<p>The person with the smaller mass (C)</p> Signup and view all the answers

<p>Smaller mass results in greater acceleration (A)</p> Signup and view all the answers

<p>7.78 m/s (B)</p> Signup and view all the answers

<p>Following through during a shot or swing (D)</p> Signup and view all the answers

<p>Impact time (B)</p> Signup and view all the answers

<p>Both momentum and kinetic energy (D)</p> Signup and view all the answers

<p>There is a total loss of kinetic energy (B)</p> Signup and view all the answers

<p>L = mv (D)</p> Signup and view all the answers

<p>It remains constant. (B)</p> Signup and view all the answers

<p>Internal forces do not affect the overall motion of the system. (A)</p> Signup and view all the answers

<p>540 kg⋅m/s (D)</p> Signup and view all the answers

<p>They move with the same velocity and direction. (D)</p> Signup and view all the answers

<p>$W = F imes d$ (A)</p> Signup and view all the answers

<p>600 J (C)</p> Signup and view all the answers

<p>0 J (A)</p> Signup and view all the answers

<p>-700 J (A)</p> Signup and view all the answers

<p>Joules (J) (B)</p> Signup and view all the answers

<p>It will remain in a state of rest if no net external forces act on it. (C)</p> Signup and view all the answers

<p>a = rac{F}{m} (C)</p> Signup and view all the answers

<p>The force must equal the weight of the dumbbell. (A)</p> Signup and view all the answers

<p>They are not considered when applying Newton's laws. (C)</p> Signup and view all the answers

<p>The object will accelerate in the direction of the force. (A)</p> Signup and view all the answers

The branch of dynamics focusing on causes of linear motion, based on Newton's laws.

An object at rest stays at rest, and an object in motion continues at constant velocity if no net external forces act on it.

A condition where all external forces acting on an object sum to zero, maintaining it at rest.

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (ΣF = ma).

The formula a = F/m shows how acceleration (a) depends on net force (F) and mass (m).

Newton's second law applies to both horizontal and vertical forces and accelerations.

The equation ΣF_{y} = m a_{y} describes vertical forces and acceleration relationship.

To find vertical acceleration, use a_{y} = ΣF_{y}/m.

The equation ΣF_{x} = m a_{x} describes horizontal forces and acceleration relationship.

For every action, there is an equal and opposite reaction force.

Forces are always equal and opposite as per Newton's Third Law.

The effect of a force depends on the mass of the body acted upon.

The shot putter pushes on the shot, causing it to accelerate more due to its smaller mass.

Each person experiences weight, friction, reaction force, and gravity in different amounts.

The person with smaller mass will accelerate more due to smaller opposing forces.

The quantity of motion a body possesses, defined as L = mv.

In the absence of external forces, total linear momentum remains constant: L_i = L_f.

Forces objects exert on each other during a collision that don't affect overall motion.

Two objects post-collision move with the same velocity and original momentum of the more massive one.

Calculate momentum using m*v; 90 kg hockey player at 6 m/s yields 540 kg⋅m/s just before collision.

The product of a force and the time interval over which it acts.

Impulse equals the change in momentum for an object.

The average force exerted is impulse divided by time of contact.

Impulse is measured in Newton-seconds (N⋅s).

The velocity of a toboggan after being pushed depends on the force applied over time and its mass.

Impact forces are large forces experienced during a short collision between two bodies.

In a perfectly elastic impact, both momentum and kinetic energy are conserved.

In a perfectly plastic impact, kinetic energy is lost and the system's velocity is zero after collision.

The product of force and displacement in the direction of the force, calculated as W = F(d).

Work is measured in Joules (J) or Newton-meters (Nm).

A quantity that has only magnitude and no direction, such as work.

Work is positive when the displacement is in the same direction as the force applied.

Total work can be zero if the start and end positions are the same, despite positive and negative work done.

A measure of elasticity for colliding bodies, represented as 'e' (0 to 1).

e = √(bounce height / drop height) calculates the coefficient of restitution.

Increased impact velocity raises the COR, making the rebound livelier in sports.

Work done when force and displacement are in opposite directions.

Positive work is concentric; negative work is eccentric.

Muscle contraction where no displacement occurs, resulting in zero work.