Chapter-02: Kinematics

After studying this unit, the students will be able to:

• Describe the crucial role of Physics in Science, Technology and society.
• Explain with examples the Science is based on physical quantities which consist of numerical magnitude and a unit.
• Differentiate between base and derived physical quantities.
• List the seven units of System International (SI) alongwith their symbols and physical quantities (standard definitions of SI units are not required).
• Interconvert the prefixes and their symbols to indicate multiple and sub-multiples for both base and derived units.
• Write the answer in scientific notation in measurements and calculations.
• Describe the working of Vernier Callipers and screw guage for measuring length.
• Identify and explain the limitations of measuring instruments such as metre rule, Vernier Callipers and screw guage.

Multiple Choice Questions
1.	Study of motion of the bodies is known as:
	a. Heat	b. Light
	c. Atomic physics	d. Mechanics
2.	Study of motion without discussing the cause of motion is called:
	a. Kinematics	b. Dynamics
	c. Heat	d. Motion
3.	If a body does not change its position with respect to some observer then it will be in a state of:
	a. Rest	b. Motion
	c. Uniform motion	d. Relative motion
4.	If a body changes its position with respect to some observer then it will be inn state of:
	a. Rest	b. Motion
	c. Uniform motion	d. Relative motion
5.	Rest and motion are _____ states:
	a. Absolute	b. Constant
	c. Variable	d. Relative
6.	Which one of the following is a vector quantity?
	a. Displacement	b. Speed
	c. Volume	d. Work
7.	The spinning motion of a body about its axis is known as.
	a. Translatory motion	b. Vibratory motion
	c. Rotatory motion	d. none of these
8.	When a body moves to and fro about a point and repeats its motion again and again about the same point then this motion is known as:
	a. Translatory	b. Vibratory
	c. Rotatory	d. none of these
9.	The motion of the string of a violin is:
	a. Translatory	b. Vibratory
	c. Rotatory	d. none of these
10.	Total length of a path between two points is known as:
	a. Velocity	b. Acceleration
	c. Speed	d. Distance
11.	The shortest distance between two points is known as:
	a. Velocity	b. Displacement
	c. Speed	d. Distance
12.	The area under a speed time graph represents
	a. Speed	b. Volume
	c. Acceleration	d. Distance
13.	SI unit of speed is:
	a. ms-1	b. mh-1
	c. kms-1	d. All of these
14.	Speed is a ________ quantity:
	a. Vector	b. Scalar
	c. Both	d. none of these
15.	If a body covers equal distance in equal intervals of time, however small the intervals may be, then the speed of the body is known as:
	a. Uniform	b. Variable
	c. Non uniform	d. All of these
16.	The rate of displacement with respect to time is known as:
	a. Distance	b. Speed
	c. Velocity	d. Acceleration
17.	If the speed and direction of the moving body does not change with time then it velocity is said to be:
	a. Uniform	b. Variable
	c. Constant	d. All of these
18.	If the speed or direction of the moving body changes with time then its velocity is said to be:
	a. Uniform	b. Variable
	c. Constant	d. All of these
19.	Rate of change of velocity is known as:
	a. Distance	b. Speed
	c. Velocity	d. Acceleration
20.	If the velocity of the body is increasing then its acceleration will be:
	a. Positive	b. Negative
	c. Uniform	d. Variable
21.	If the velocity of body is decreasing then its acceleration will be:
	a. Positive	b. Negative
	c. Uniform	d. Variable
22.	If the velocity of a body is uniform then its acceleration will be:
	a. Positive	b. Negative
	c. Zero	d. Doubled
23.	SI unit of acceleration is:
	a. ms-1	b. kmh-1
	c. kms-2	d. ms-2
24.	If velocity of a body changes equally in equal intervals of time then its acceleration will be:
	a. Uniform	b. Variable
	c. Constant	d. Relative
25.	The velocity and acceleration of a body moving with uniform speed in a circular path will be:
	a. In the same direction	b. In the opposite direction
	c. Mutually perpendicular	d. Equal
26.	The direction of motion of body and acceleration is in same direction then acceleration will be:
	a. Uniform	b. Positive
	c. Negative	d. Zero
27.	The direction of motion of body and acceleration is in opposite direction the acceleration will be:
	a. Uniform	b. Positive
	c. Negative	d. Zero
28.	The quantity which can be described by a number, with suitable unit only is called:
	a. Vector	b. Scalar
	c. Speed	d. Acceleration
29.	The quantity which are described by magnitude as well as direction is called:
	a. Vector	b. Scalar
	c. Speed	d. Acceleration
30.	In equations of motion, motion will always be taken along ______ line:
	a. Circular	b. Straight
	c. Elliptical	d. None of above
31.	In equations of motion, Acceleration will always be:
	a. Uniform	b. Variable
	c. Positive	d. Negative
32.	In equations of motion, initial velocity will be taken as:
	a. Uniform	b. Variable
	c. Positive	d. Negative
33.	In equations of motion, quantities in the direction of initial velocity are taken as:
	a. Uniform	b. Variable
	c. Positive	d. Negative
34.	In equations of motion, quantities in opposite to the direction of initial velocity are taken as:
	a. Uniform	b. Variable
	c. Positive	d. Negative
35.	The slope of straight line in speed time graph gives the magnitude of:
	a. Force	b. Displacement
	c. Torque	d. Acceleration
36.	Series of experiments on free fall of heavy bodies was performed by:
	a. Newton	b. Einstein
	c. Galileo	d. Al-Kundi
37.	When a body is falling freely under the gravity then in equations of motion ‘a’ is replaced by:
	a. m	b. d
	c. S	d. g
38.	If a body is falling under the gravity then its initial velocity will be:
	a. Positive	b. Negative
	c. Increasing	d. Zero
39.	If a body falling under the gravity then its gravitational acceleration will be:
	a. Positive	b. Negative
	c. Increasing	d. Zero
40.	If a body is thrown vertically upward then its final velocity will be:
	a. Positive	b. Negative
	c. Uniform	d. Zero
41.	If a body is thrown upward, then its gravitational acceleration will be:
	a. Positive	b. Negative
	c. Increasing	d. Zero
42.	A ball is dropped from the top of the tower. The distance covered by it in the first second is:
	a. 100 m	b. 10 m
	c. 50 m	d. 5 m
43.	If a car is moving with uniform speed in a circle then its velocity will be:
	a. Uniform	b. Variable
	c. Zero	d. None of above
44.	There are ____ equations of motion which are used to solve the problems about the motion of bodies:
	a. 1	b. 2
	c. 3	d. 4

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