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8.1.1 MOTION ALONG A STRAIGHT LINE The simplest type of motion is the motion along a straight line. We shall first learn to describe this by an example. Consider the motion of an object moving along a straight path. The object starts its journey from O which is treated as its reference point (Fig. 8.1). Let A, B and C represent the
- What Is Motion?
- Types of Motion
- Examples of Motion
We can define motion as the change of position of an object with respect to time. A book falling off a table, water flowing from the tap, rattling windows, etc., all exhibit motion. Even the air that we breathe exhibits motion! Everything in the universe moves. We live in a universe that is in continual motion. The fundamental particle of matter, t...
We might have noticed that different objects move differently. Some objects move in a curved path, some in a straight path and a few others in a different way. According to the nature of the movement, motion is classified into three types as follows: 1. Linear Motion 2. Rotary Motion 3. Oscillatory Motion
Now let us understand motion clearly with the help of a few examples. 1. Our daily activities, like walking, running, closing the door, etc. involve motion. There is a change of position of the object involved in these activities. 2. The flow of air in and out of our lungs is also an example of motion. 3. The automobiles that carry passengers from ...
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Fig. 5.11. Answer The forces acting on a block of mass m at rest on an inclined plane are (i) the weight mg acting vertically downwards (ii) the normal force N of the plane on the block, and (iii) the static frictional force f. opposing the impending motion. In equilibrium, the resultant of these forces must be zero.
velocity at time t = 4 s (point P) for the motion of the car represented in Fig.2.1 calculation. Let us take ∆t = 2 s centred at t = 4 s. Then, by the definition of the average velocity, the slope of line P 1P 2 ( Fig. 2.1) gives the value of average velocity over the interval 3 s to 5 s. Fig. 2.1 Determining velocity from position-time graph.
velocity = speed + direction of motion Things that have both a magnitude and a direction are called vectors. More on vectors in Ch.3. For 1D motion (motion along a straight line, like on an air track), we can represent the direction of motion with a +/– sign. + = going right .
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He accidentally runs over an innocent moose crossing the road, so he slows to a stop to check on the poor moose. He pauses for a while until he determines the moose is squashed flat and deader than a doornail. Fleeing the scene of the crime, Schmedrick takes off again in the same direction, speeding up quickly.
Links to Physics: Understanding of motion is fundamental to mechanics including constant or accelerated motion of cars to electrons. Other topics will also require the introduction of motion. Examples include wave motion (as in sound and light), electricity and magnetism (movement of force fields) and celestial movement within the heavens.
