Physics Flashcards: Velocity and Motion Concepts

Questions and Answers

What does the slope of a position versus time graph give?

velocity

What does the magnitude and direction refer to?

vector

What are numbers without direction called?

scalar

What is the rate at which an object changes called?

velocity Signup and view all the answers

What does the slope of a distance vs time graph represent?

velocity Signup and view all the answers

Where do you find 'how long' an object traveled on a Vel-Time Graph?

x-axis Signup and view all the answers

Where do you find 'how far' an object traveled on a Pos-Time Graph?

y-axis Signup and view all the answers

Where do you find 'how long' an object traveled on a Pos-Time Graph?

x-axis Signup and view all the answers

What do we know about objects that slow down?

velocity is negative and acceleration is positive or velocity is positive and acceleration is negative Signup and view all the answers

Where do you find 'how fast' an object traveled on a Vel-Time Graph?

y-axis Signup and view all the answers

Where do you find 'how far' an object traveled on a Vel-Time Graph?

area Signup and view all the answers

What do you know about objects that speed up?

velocity and acceleration are both negative or velocity and acceleration are both positive Signup and view all the answers

What does having a constant acceleration mean?

an object is moving at a constantly changing speed Signup and view all the answers

Where do you find 'how fast' an object changed its velocity on a Vel-Time Graph?

slope Signup and view all the answers

Where do you find 'how fast' an object traveled on a Pos-Time Graph?

slope Signup and view all the answers

At the peak of its height, what happens to a ball thrown straight up?

its acceleration would be negative Signup and view all the answers

Compared to Object 1, how far does Object 2 fall if it falls freely for 8.0 seconds?

four times as far Signup and view all the answers

How far does a heavy ball fall during the 2nd second?

15 meters Signup and view all the answers

What happens to the velocity of a leftward moving vehicle that applies its brakes?

velocity is negative and acceleration is positive Signup and view all the answers

What is the velocity of a ball thrown vertically upward with an initial velocity of 20 m/s at t=5.0 seconds?

-30.0 m/s Signup and view all the answers

What must be true about an object moving with constant non-zero velocity?

The net force on the object is zero Signup and view all the answers

How can one find the coefficient of friction of an object on a flat surface?

Ff/mg Signup and view all the answers

What can you say about a shopping cart that is full of groceries?

harder to stop moving because of a large inertia Signup and view all the answers

What expression best describes a child on her bicycle rolling to a stop?

uFn Signup and view all the answers

How are mass and weight related?

acceleration due to gravity Signup and view all the answers

If an object moves from left to right with decreasing velocity, what can be said about the net force?

a net force that is leftward Signup and view all the answers

If the applied force on an object is increased by a factor of 4, how does that affect the acceleration?

is increased by a factor of 4 Signup and view all the answers

What force caused you to slide forward when a bus stops suddenly?

no force is making you slide forward Signup and view all the answers

Study Notes

Motion and Graphs

The slope of a position versus time graph represents velocity.
The slope of a distance versus time graph also indicates velocity.
The x-axis of a velocity-time graph shows how long an object traveled.
The y-axis of a position-time graph displays how far an object has traveled.
The area under a velocity-time graph determines how far an object has traveled.

Vectors and Scalars

Vectors have both magnitude and direction (e.g., position).
Scalars are quantities without direction (e.g., temperature, distance).

Acceleration and Velocity

Velocity is defined as the rate at which an object changes its position.
Objects that slow down have a negative velocity with a positive acceleration, or a positive velocity with a negative acceleration.
Objects that speed up have both velocity and acceleration either negative or positive.
Constant acceleration means an object's speed is continually changing.

Falling Objects

An object falls freely, traveling further as time increases; after 8.0 seconds, it falls four times as far as after 4.0 seconds.
During the second second of free fall, a heavy ball dropped from a height falls 15 meters.

Forces and Motion

A leftward-moving vehicle applying brakes experiences negative velocity with positive acceleration.
An object moving with a constant non-zero velocity exerts a net force of zero.

Mass and Weight Relations

Mass and weight are interconnected through the acceleration due to gravity.
A heavier object, like a full shopping cart, is harder to stop due to its greater inertia.

Friction and Forces

To calculate the coefficient of friction for an object on a flat surface, use the formula Ff/mg.

Miscellaneous Concepts

A child slowing down on a bicycle is best described by the expression uFn.
If the applied force on an object is quadrupled, its acceleration is also increased by a factor of four.
Sliding forward in a bus that stops suddenly is due to inertia rather than an external force acting upon you.

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Description

Test your knowledge of key physics concepts with these flashcards focusing on velocity, vectors, and scalars. Each card presents a term along with its definition, helping you to master the relationship between position, time, and motion. Ideal for students looking to reinforce their understanding of motion in physics.