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Physics Chapter: Motion and Speed

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Questions and Answers

What is the unit of measurement for speed?

Meters per second (correct)

Kilometers per hour

Velocity per second

Distance per time

What is the difference between speed and velocity?

Speed is the rate of movement, while velocity is the rate of movement plus the direction (correct)

Speed is the direction of an object, while velocity is the rate of movement

Speed is the rate of movement, while velocity is the rate of movement minus the direction

Speed is the direction of an object, while velocity is the rate of movement minus the direction

What happens to the acceleration of a car when it slows down?

The acceleration decreases (correct)

The acceleration becomes zero

The acceleration remains the same

The acceleration increases

What is acceleration?

A change in the velocity of an object Signup and view all the answers

Why does a car accelerate when it changes direction?

Because the car changes velocity Signup and view all the answers

What is the formula to calculate speed?

Distance divided by time Signup and view all the answers

What happens to the velocity of an object when it accelerates?

The velocity changes Signup and view all the answers

Study Notes

Motion and Speed

Speed refers to the rate at which an object moves over a certain amount of time.
Speed is calculated by dividing distance (in meters) by time (in seconds).
The unit of measurement for speed is meters per second (m/s).

Velocity

Velocity is the speed of an object plus the direction it travels.
It includes both speed and direction.

Acceleration

Acceleration is a change in the velocity of an object.
If a car speeds up, its acceleration increases.
If a car slows down, its acceleration decreases.
Any change in velocity is acceleration, including changes in direction.
Acceleration occurs when there is a change in speed or direction of an object.

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Description

Understand the concepts of speed, velocity, and acceleration, including their definitions and units of measurement.