# What are 2 things must you know to describe the motion of an object?

## What are 2 things must you know to describe the motion of an object?

What two things must you know to describe the motion of an object? You must know the direction the object is moving and how fast the object is moving.

## How do you find the speed of an object in motion?

The equation for speed is simple: distance divided by time. You take the distance traveled (for example 3 meters), and divide it by the time (three seconds) to get the speed (one meter per second).

What is the measure of an object in motion?

Velocity (Rate of change of position) Velocity is equivalent to the speed of the object along with the direction of motion. Velocity of an object can change with the change in speed and the direction of object. Speed and velocity have the same units, that is, m s–1 or m/s.

### What two things must you know to determine speed?

Chapter 19 – Motion

What two factors determine speed? distance & time
What is the difference between speed and velocity? Velocity has direction speed does not.
What best represents acceleration as presented on a graph? velocity change vs. time
What is force? a push or pull acting on an object.

### How do you describe motion of an object?

You can describe the motion of an object by its position, speed, direction, and acceleration. An object is moving if its position relative to a fixed point is changing. Even things that appear to be at rest move.

How do you describe motion in physics?

motion, in physics, change with time of the position or orientation of a body. Motion along a line or a curve is called translation. In both cases all points in the body have the same velocity (directed speed) and the same acceleration (time rate of change of velocity).

#### How do you find the distance of an object?

When you try to find the distance a moving object has traveled, two pieces of information are vital for making this calculation: its speed (or velocity magnitude) and the time that it has been moving. With this information, it’s possible to find the distance the object has traveled using the formula d = savg × t.

#### What is the measurement of distance?

Distance measures length. In the metric system of measurement, the most common units of distance are millimeters, centimeters, meters, and kilometers.

What does distance mean in physics?

Distance is a scalar quantity that refers to “how much ground an object has covered” during its motion. Displacement is a vector quantity that refers to “how far out of place an object is”; it is the object’s overall change in position.

## What factors does speed depend on?

The two factors necessary for the description of motion (the speed) are the distance covered by the moving body and the time taken by the moving body to cover this distance.

## What factors affect the speed of an object?

There are four main factors that affect the motion of objects. These factors are force, friction, inertia, and momentum.

When do you know both the speed and direction of an object?

When you know both the speed and direction of an object’s motion, you know the velocity of the object. Speed in a certain direction is called velocity. How do you Graph Motion?

### Which is true when an object is in motion?

If an object moves in the same direction and at a constant speed for 4 hours, which of the following is true? it is in motion. it is speeding. it has a high velocity. it is accelerating. If distance is measured in kilometers and time is measured in hours, the unit of speed will be This graph shows how the distance of an object changes over time.

### How can you tell if something is in motion?

If you know the distance an object has traveled in a certain amount of time, you can determine the A place or object used for comparison to determine if something is in motion is called If an object moves in the same direction and at a constant speed for 4 hours, which of the following is true? it is in motion.

How to calculate the rate of motion of an object?

the overall rate of speed at which an object moves; calculated by dividing the total distance an object travels by the total time instantaneous speed the rate at which an object is moving at a given instant in time velocity speed in a given direction slope the steepness of a line on a graph (rise/run)

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