Question

5. A distance-time graph plotted for a
moving car has a straight line gradient.
Which of the following is true about the
car?
a. It is in uniform motion
b. It is moving very fast
c. It is not moving
d. It is in non-uniform motion​

Answer 1

Answer:

Motion lays emphasis on the concept of motion of an object. The chapter is covered under six sections. In the first section, the motion is described using examples and motion along a straight line is explained along with the concept of distance and displacement. In addition to this, the section talks about uniform and non-uniform motion. The concept is explained with the help of suitable examples and diagrams. In the second section of the chapter, measurement of the rate of motion is explained wherein, the concept of speed and average speed is covered in addition to their mathematical formulas and S.I. units. Apart from this, the section covers an explanation of the term velocity with the help of examples. Its mathematical expression is also given here. In the third section of the chapter, the concept of acceleration is covered along with its formula. The fourth section deals with the graphical representation of motion. The following three types of graphs are discussed:

Distance-time graph

Velocity-time graph

The above graphs are plotted for objects in uniform motion as well as non-uniform motion. Further, the equations of motion are derived in the fifth section with a graphical method and the following relations between the quantities are explained:

Velocity-time relation

Position-time relation

Position-velocity relation

All the concepts of the chapter are explained with the help of numerical. The last section talks about the uniform circular motion of the object.

The important topics covered in the chapter, Motion are as follows:

(I) Motion along a Straight Line

(II) Distance and Displacement

(III) Uniform and Non-uniform Motion

(IV) Measurement of the Rate of Motion

(V) Speed and Velocity

(VI) Acceleration

(VII) Graphical Representation of Motion

(VIII) Equations of Motion

(IX) Uniform Circular Motion

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