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Physics Formulas Flashcards
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Physics Formulas Flashcards

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Questions and Answers

What is the formula for Kinematics #1?

a = (vf - vi) / t

What is the formula for Kinematics when acceleration is constant or zero?

v = (vi + vf) / 2

What does Fg = mg represent?

Weight or gravitational force.

What is the formula for net force in dynamics?

<p>Fnet = ma</p> Signup and view all the answers

What is the formula for distance in two-dimensional motion?

<p>d = (vx)(t)</p> Signup and view all the answers

What is the formula to calculate time in two-dimensional motion?

<p>t = (vi)(sinθ) / g</p> Signup and view all the answers

What is the formula for the magnitude of initial velocity with vertical component?

<p>Vy = (vi)(sinθ)</p> Signup and view all the answers

In free fall, mass is needed to determine the motion.

<p>False</p> Signup and view all the answers

What does the relationship between the acceleration of an object falling freely indicate?

<p>Constant acceleration in a straight line.</p> Signup and view all the answers

What is the acceleration due to gravity when an object is dropped downward?

<p>+9.81 m/s²</p> Signup and view all the answers

What happens to an object thrown upwards?

<p>It goes up and then comes down.</p> Signup and view all the answers

Nonzero acceleration has a curve going right.

<p>True</p> Signup and view all the answers

What is meant by constant nonzero acceleration?

<p>Uniform acceleration.</p> Signup and view all the answers

What combination of changes increases the time of flight for a launched tennis ball?

<p>Increase the launch angle and increase the ball's initial speed.</p> Signup and view all the answers

What launch angle results in the greatest horizontal distance for a golf ball returning to ground?

<p>45 degrees</p> Signup and view all the answers

What does g = Gm/r² represent?

<p>Magnitude of acceleration due to gravity.</p> Signup and view all the answers

If balls are thrown from the same height, they will reach the ground at the same time.

<p>True</p> Signup and view all the answers

How to find the distance when a ball is thrown horizontally?

<p>Use d = vit + 1/2at² where vi = 0.</p> Signup and view all the answers

What is the formula for the horizontal component of initial velocity?

<p>Vx = ViCosθ</p> Signup and view all the answers

What occurs when a ball is thrown at an angle above the horizontal at its highest point?

<p>The vertical component of the ball's velocity is zero.</p> Signup and view all the answers

What does the slope on the position-time graph represent?

<p>Velocity</p> Signup and view all the answers

What is the formula for slope?

<p>Change in y over change in x</p> Signup and view all the answers

Study Notes

Kinematics

  • The formula for acceleration is represented as a = (vf - vi) / t, where vf is final velocity, vi is initial velocity, and t is time.
  • For constant acceleration or no acceleration, average velocity can be calculated as v = (vi + vf) / 2.

Dynamics

  • The force of gravity acting on an object is expressed as Fg = mg, where m is mass and g is acceleration due to gravity (approximately 9.81 m/s²).
  • The net force acting on an object can be calculated using Fnet = ma, where m is mass and a is acceleration.

Two-Dimensional Motion

  • The distance in the horizontal motion can be calculated with d = (vx)(t), where vx is horizontal velocity and t is time.
  • Time of flight in a projectile motion can be determined by the formula t = (vi * sinθ) / g, where vi is initial velocity, θ is the launch angle, and g is acceleration due to gravity.

Vertical Motion Components

  • The vertical component of the initial velocity is found using Vy = (vi)(sinθ).
  • In free fall, the mass of the object does not influence its acceleration.

Free Fall Characteristics

  • The relationship between acceleration and falling objects indicates that when there is no velocity, there is no acceleration.
  • Objects dropped experience a downward acceleration of +9.81 m/s².

Motion Dynamics

  • For objects thrown upwards, the trajectory will eventually lead back down due to gravity.
  • Nonzero acceleration results in a curve in the motion path.

Acceleration Types

  • Constant nonzero acceleration represents uniform acceleration, indicating a steady increase or decrease of velocity over time.

Projectile Motion Analysis

  • Increasing both the launch angle and the initial speed of a projectile will result in greater time of flight.
  • A launch angle of 45 degrees maximizes the horizontal distance traveled by a projectile.

Additional Factors in Motion

  • The acceleration magnitude due to gravity is given by g = Gm/r², relating gravitational force to mass and distance from the center of the Earth.
  • If two balls are thrown from the same height, they will reach the ground simultaneously, assuming air resistance is negligible.

Position and Velocity

  • A ball thrown horizontally maintains a horizontal speed while being influenced by gravity vertically, where vi for vertical motion is zero.
  • The horizontal velocity can be calculated using Vx = Vi * cosθ, where θ is the launch angle.

Projectile Peak Characteristics

  • At the peak of a projectile’s trajectory, its vertical component of velocity equals zero, while horizontal components maintain their velocities.

Graph Interpretation

  • The slope of a position-time graph represents the object's velocity, indicating speed and direction of motion.
  • The slope is calculated by the change in y (position) divided by the change in x (time).

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Test your knowledge of essential physics formulas that are not included in the reference table. This set of flashcards covers various topics such as kinematics, dynamics, and two-dimensional motion. Perfect for physics students looking to strengthen their understanding of key concepts.

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