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?

Fnet = ma Signup and view all the answers

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

d = (vx)(t) Signup and view all the answers

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

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

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

Vy = (vi)(sinθ) Signup and view all the answers

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

False Signup and view all the answers

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

Constant acceleration in a straight line. Signup and view all the answers

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

+9.81 m/s² Signup and view all the answers

What happens to an object thrown upwards?

It goes up and then comes down. Signup and view all the answers

Nonzero acceleration has a curve going right.

True Signup and view all the answers

What is meant by constant nonzero acceleration?

Uniform acceleration. Signup and view all the answers

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

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

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

45 degrees Signup and view all the answers

What does g = Gm/r² represent?

Magnitude of acceleration due to gravity. Signup and view all the answers

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

True Signup and view all the answers

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

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

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

Vx = ViCosθ Signup and view all the answers

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

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

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

Velocity Signup and view all the answers

What is the formula for slope?

Change in y over change in x 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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Description

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.