# Relationship between relative motion and reference point

### What is the relationship between motion and a reference point As regards the relationship between motion and a reference point,you can use a reference point to describe Motion is measured relative to a reference point?. RELATIVE MOTION When we talk about the velocity of something we first determine a reference point and then according to this reference point we say the . An object is in motion if it changes position relative to a reference point. Objects that are A straight line between San Francisco and Boston would be. 4, km. Since speed is the rate that distance changes in relation to time, the slope.

Velocity generally is measured in meters per second.

## When an object changes position relative to a reference point

Because it incorporates direction as well as speed, velocity is calculated as the displacement of an object over a period of time: Velocity can be illustrated as follows. If a dog walks eastward in a straight line from Point A to Point B at a constant speed of 0. If the dog walks in a circle beginning and ending at Point A at a constant speed of 0. Because its position is unchanged at the end of its journey, its displacement and thus its velocity are zero.

Because velocity incorporates direction as well a speed, two objects moving at the same speed but in different directions will have different velocities. A dog moving eastward at 0. Vectors and scalars Displacement and velocity are called vector quantities because they have both magnitude size or strength and direction. A vector quantity cannot be specified completely by a number. Speed, which has magnitude but not direction, is not a vector quantity. Instead, it is described as a scalar quantity. A distance-time graph can be used to see how distance and speed change with time. The graph is a line graph in which the distance the object has traveled is plotted against time. In a distance-time graph, time is shown on the horizontal axis, or x-axis, and distance is shown on the vertical axis, or y-axis. The graph is plotted like this: This corresponds to an increasing, or rising, line on the graph. The faster the object moves, the steeper the rising line. Thus, even though its speed is zero, time continues. The English scientist Isaac Newton proposed three laws that show how the motion of objects can be changed by forces.

The first law states that the motion of an object will not change unless an unbalanced force pushes or pulls on the object. In his second law, Newton related force with mass and acceleration, showing that a strong force makes an object move faster than a weak force acting on the same object.

## Overview of Motion

Take a minute to check out all the enhancements! The same safe and trusted content for explorers of all ages. Accessible across all of today's devices: Newton's Law of Inertia dictates linear motion unless affected by a force changing the direction of the object. Collision A collision is a special type of linear motion where momentum and energy—and thus motion—may be transferred when two objects collide or smash into each other.

Rotational An object can rotate about its center of mass. The Law of Inertia applies in a special case, such that the object will continue to rotate unless constrained or affected by a force.

### What is the relationship between motion and a reference point

Periodic An object or group of objects can be made to move back-and-forth in periodic motion if the motion is constrained and some continues force is applied. The example of a pendulum show periodic motion. Its motion is constrained by the string, while the force of gravity keeps it in motion. Summary Motion is change in position.

All motion is relative to some fixed point or object. Speed is a measurement of that change in position over time. Velocity is speed in a given direction. Acceleration is the increase in speed or velocity over a period of time.