Kinematics - Physics For Class IX (Science Group) - Multiple Choice Questions (MCQs) , Fill in the blanks and Concept Map

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Physics For Class IX (Science Group)
UNIT 2: KINEMATICS
Multiple Choice Questions

Tick mark (✓) the correct answer:
01. Scalar quantities have and suitable unit.
(a) magnitude ✓
(b) direction
(c) both a and b
(d) None of them

02. Vector quantities have along with magnitude and unit.
(a) magnitude
(b) direction ✓
(c) both a and b
(d) None of them

03. Which one is a vector quantity?
(a) Mass
(b) Weight ✓
(c) Time
(d) temperature

04. Which one is a scalar quantity?
(a) Time ✓
(b) Force
(c) Velocity
(d) Acceleration

05. Distance is a _____ quantity.
(a) Vector
(b) Scalar ✓
(c) both a and b
(d) None of these

06, What is S.1 unit of acceleration?
(a) ms^-1
(b) ms^-2 ✓
(c) nm
(d) m²

07. What is a S.I Unit of velocity?
(a) Nm
(b) ms^-1 ✓
(c) ms^-2
(d) m²s

08. Shortest distance between two points is called:
(a) distance
(b) speed
(c) displacement ✓
(d) velocity

09. The branch of physics which is related with the study of motion of objects is called:
(a) thermodynamics
(b) kinematics
(c) dynamics
(d) mechanics ✓

10. The word kinematics is derived from Greek word "Kinema" which means:
(a) motion ✓
(b) rest
(c) speed
(d) body

11. The branch of Mechanics which deals with motion of objects without reference of force which cause motion is called:
(a) thermodynamics
(b) kinematics ✓
(c) dynamics
(d) mechanics

12. All objects in universe are:
(a) in motion ✓
(b) at rest
(c) oval in shape
(d) None of them

13. Types of motion are:
(a) five
(b) four
(c) three ✓
(d) two

14. Motion of a body along a straight line is called:
(a) translatory motion
(b) random motion
(c) vibratory motion
(d) linear motion ✓

15. The motion of a rider on the Ferris wheel is an example of:
(a) circular motion
(b) rotatory motion ✓
(c) random motion
(d) vibratory motion

16. Back and forth motion of a body about its mean position is called:
(a) vibratory motion
(b) oscillatory motion
(c) Both 'a' & 'b' ✓
(d) None of them

17. The motion of the clock's pendulum is an example of:
(a) circular motion
(b) rotatory motion
(c) translatory motion
(d) vibratory motion ✓

18. The body moves back and forth about mean position in:
(a) vibratory motion ✓
(b) rotatory motion
(c) circular motion
(d) translatory motion

19. Its S.I. unit is meter.
(a) Distance
(b) Displacement
(c) Both 'a' & 'b' ✓
(d) None of these

20. S/t is the expression for:
(a) speed
(b) velocity
(c) Both 'a' & 'b' ✓
(d) None of these

21. Speed of an object in a certain direction is:
(a) acceleration
(b) velocity ✓
(c) displacement
(d) distance

22. Acceleration is produced whenever:
(a) the velocity of an object changes
(b) direction of motion of the object changes
(c) Both 'a' & 'b' ✓
(d) None of these

23. Due to decrease in velocity, acceleration will be:
(a) positive & is in the direction of velocity
(b) negative & is in the direction of velocity
(c) positive & is opposite to that of change velocity
(d) negative & is opposite to that of change velocity ✓

24. Density is a:
(a) scalar quantity ✓
(b) vector quantity
(c) Both 'a' & 'b'
(d) None of these

25. The gradient on the distance-time graph is numerically equal to the:
(a) acceleration
(b) speed ✓
(c) force
(d) momentum

26. When bus travels with non-uniform speed, the distance time graph is a:
(a) broken line
(b) straight line
(c) circle
(d) curve ✓

27. The gradient on speed - time graph gives the:
(a) acceleration ✓
(b) speed
(c) force
(d) momentum

28. The basic equations of motion for bodies moving with uniform acceleration are:
(a) two
(b) three ✓
(c) four
(d) five

29. v_i + at =:
(a) aS
(b) 2aS
(c) v_f ✓
(d) v_f²

30. S = v_it + 1/ 2 _____.
(a) v_f
(b) v_f²
(c) at
(d) at² ✓

31. 2aS = ___.
(a) v_f + v_i
(b) v_f² + v_i²
(c) v_f - v_i
(d) v_f² - v_i² ✓

32. If two stones of different sizes are dropped from same height simultaneously, which of them will hit the ground first?
(a) Heavier stone
(b) Lighter stone
(c) Both hit the ground at the same time ✓
(d) Depends on the weather

33. The value of acceleration due to gravity 'g' near the surface of earth is found to be:
(a) 9.81 ms^-2 ✓
(b) 9.81 ms^-1
(c) 9.81 ms
(d) 9.81 ms²

34. Gravitational acceleration is taken negative for objects moving:
(a) upward
(b) downward ✓
(c) left direction
(d) right direction

Fill In The Blanks

1. A body is said to be at rest if it does not change its position with respect to its surroundings.
2. A body is said to be in motion if it changes its position with respect to its surroundings.
3. When all points of moving body move uniformly along the same straight line the motion is called translatory motion.
4. Motion of a body along straight line is called linear motion.
5. Motion of a body along a circular path is called circular motion.
6. Irregular motion of an object is called random motion.
7. The motion of the body around a fixed axis which passes through body itself is called spin motion.
8. Back and forth motion of a body about its mean position is called vibratory or oscillatory motion.
9. The total length covered by moving body without mentioning direction of motion is called distance.
10. The distance measured in straight line in a particular direction is called displacement.
11. Distance covered by an object in a unit time is called speed.
12. An object covers an equal distance in equal interval of time is called uniform speed.
13. Rate of change of displacement with respect to time is called velocity.
14. Rate of change of velocity of an object with respect to time is called acceleration.
15. The gradient on the distance time graph is numerically equal to the speed.
16. The physical quantities that have magnitude and suitable unit are called scalar quantities.
17. The physical quantities completely specified by magnitude in suitable unit and particular direction are called vector.
18. The motion under gravitational force of Earth is always directed towards Earth.
19. The value of ‘g’ is taken as 10 ms^-2.

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