Motion - Multiple Choice Test

Question 1

Question:   1 km/h = _____ m/s

1.
2.
3.
4.

 

Answer:   1

Question 2

Question:   The distance (s) in metres travelled by a particle is related to time (t) in seconds by the equation of motion -S = 10t + 4t². What is the initial velocity of the body?

1.	10 m/s
2.	6 m/s
3.	4 m/s
4.	10 m/s2

 

Answer:   1

Question 3

Question:   For the equation - S = 10t + 4t² what is the acceleration of the body?

1.	8 m/s2
2.	10 m/s2
3.	4 m/s2
4.	8 m/s

 

Answer:   1

Question 4

Question:   A body moving along a straight line at 20 m/s decelerates at the rate of 4 m/s². After 2 seconds its speed will be equal to

1.	8 m/s
2.	12 m/s
3.	16 m/s
4.	- 12 m/s

 

Answer:   2

Question 5

Question:   Give the equation of motion connecting u, v, a and s where the symbols have their usual meaning

1.	v = u + at
2.
3.	v2 - u2 = 2aS
4.

 

Answer:   3

Question 6

Question:   An object moving with a speed of 5 m/s comes to rest in 10 s, after the brakes are applied. What is the initial velocity?

1.	zero
2.	5 m/s
3.	15 m/s
4.	50 m/s

 

Answer:   2

Question 7

Question:   A body moving along a straight line at 40 m/s undergoes an acceleration of 4 m/s². After 10 seconds its speed will be

1.	20 m/s
2.	28 m/s
3.	16 m/s
4.	80 m/s

 

Answer:   4

Question 8

Question:   SI unit of acceleration is __________.

1.
2.
3.
4.

 

Answer:   1

Question 9

Question:   Retardation is __________.

1.	negative acceleration
2.	positive acceleration
3.	uniform acceleration
4.	variable acceleration

 

Answer:   1

Question 10

Question:   When an object is moving with uniform velocity, what is its acceleration?

1.	zero
2.	uniform
3.	non-uniform
4.	negative

 

Answer:   1

Question 11

Question:   In the case of a rectilinear uniform motion, distance-time graph is a

1.	parabola
2.	straight line
3.	curved line
4.	rectangle

 

Answer:   2

Question 12

Question:   Speed of 90 km/h when expressed in m/s is .

1.	2.5
2.	25
3.	250
4.	90000

 

Answer:   2

Question 13

Question:   When a graph of one quantity versus another results in a straight line, the quantities are .

1.	directly proportional
2.	constant
3.	inversely proportional
4.	independent of each other

 

Answer:   1

Question 14

Question:   What does the following S-t graph indicate?

1.	uniform speed
2.	body is at rest
3.	non-uniform speed
4.	variable speed

 

Answer:   2

Question 15

Question:   What do you infer, if S-t graphs of two cyclists meet at a point?

1.	They collide
2.	They pass each other
3.	They are at rest
4.	They are starting from rest

 

Answer:   2

Question 16

Question:   Name the physical quantity which we get from a S-t graph.

1.	Speed
2.	Displacement
3.	Distance
4.	Time

 

Answer:   1

Question 17

Question:   What is the SI unit of speed?

1.	km/h
2.	m/s
3.	m/min
4.	km/s

 

Answer:   2

Question 18

Question:   What is the distance covered by a car in 5 h if it is moving with a speed of 35 km/h?

1.	175 km
2.	150 km
3.	7 km
4.	1750 km

 

Answer:   1

Question 19

Question:   The S-t graph for uniform speed is

1.
2.
3.
4.

 

Answer:   2

Question 20

Question:   The average speed of a car which covers half the distance with a speed of 20 m/s and other half with a speed of 30 m/s in equal intervals of time is _________.

1.	25 m/s
2.	0 m/s
3.	24 m/s
4.	2.4 m/s

 

Answer:   1

Question 21

Question:   Displacement is a ________ quantity.

1.	scalar
2.	vector
3.	derived
4.	linear

 

Answer:   2

Question 22

Question:   km / h² is a unit of ________ .

1.	velocity
2.	speed
3.	acceleration
4.	distance

 

Answer:   3

Question 23

Question:   The speed-time graph for a particle moving at constant speed is a straight-line ________ to the time axis.

1.	parallel
2.	perpendicular
3.	aligned
4.	inclined

 

Answer:   1

Question 24

Question:   When an object moves in a fixed direction with uniform acceleration, the speed-time graph is a ________.

1.	parabola
2.	straight line
3.	ellipse
4.	curve

 

Answer:   2

Question 25

Question:   The area under the speed-time graph gives the ________.

1.	distance
2.	velocity
3.	time
4.	acceleration

 

Answer:   1

Question 26

Question:   A speed of 90 km/h, expressed in cm s^-1 is ________.

1.	2.5
2.	2500
3.	300
4.	90

 

Answer:   2

Question 27

Question:   When an object of mass 5 kg starts from rest, what is its initial velocity?

1.	0
2.	- 5 m/s
3.	variable 5
4.	1 m/s

 

Answer:   1

Question 28

Question:   Identify the v- t graph representing uniform velocity.

1.
2.
3.
4.

 

Answer:   2

Question 29

Question:   Name the physical quantity that is defined as the rate of change of displacement.

1.	velocity
2.	acceleration
3.	distance
4.	speed

 

Answer:   1

Question 30

Question:   An object moves with a constant velocity of 9.8 m/s, its acceleration in m s^-2 is ________.

1.	9.8 m/s2
2.	zero
3.	0.98 m/s
4.	98 m/s2

 

Answer:   2

Question 31

Question:   In 12 minutes a car whose speed is 35 km/h travels a distance of

1.	7 km
2.	3.5 km
3.	14 km
4.	28 km

 

Answer:   1

Question 32

Question:   A body moving along a straight line at 20 m/s undergoes an acceleration of 4 m/s². After two seconds its speed will be ________.

1.	8 m/s
2.	12 m/s
3.	16 m/s
4.	28 m/s

 

Answer:   4

Question 33

Question:   A car increases its speed from 20 km/h to 50 km/h in 10 seconds. Its acceleration is ________.

1.	30 m/s2
2.	3 m/s2
3.	18 m/s2
4.	0.83 m/s2

 

Answer:   4

Question 34

Question:   When the distance covered by an object is directly proportional to time, it is said to travel with ________.

1.	zero velocity
2.	constant speed
3.	constant acceleration
4.	uniform acceleration

 

Answer:   2

Question 35

Question:   Negative acceleration means an object is moving with ________ .

1.	increasing speed
2.	decreasing speed
3.	uniform speed
4.	constant speed

 

Answer:   2

Question 36

Question:   Motion along a straight line is called __________ motion.

1.	rectilinear motion
2.	circular motion
3.	oscillatory motion
4.	parabolic

 

Answer:   1

Question 37

Question:   Distance-time graph is a straight line for __________ motion.

1.	variable
2.	non uniform
3.	rectilinear
4.	circular

 

Answer:   3

Question 38

Question:   A car is moving with a speed of 36 km/h. Its speed in m/s is _______.

1.	10
2.	100
3.	2
4.	1

 

Answer:   1

Question 39

Question:   A car starts from rest and covers a distance of 100 m in one second with uniform acceleration. Its acceleration is _________.

1.	100 m/s2
2.	50 m/s2
3.	200 m/s2
4.	100 m/s

 

Answer:   1

Question 40

Question:   Which of the following is a vector quantity?

1.	area
2.	length
3.	distance
4.	displacement

 

Answer:   4

Question 41

Question:   The slope of a v-t graph gives ________.

1.	acceleration
2.	velocity
3.	speed
4.	distance

 

Answer:   3

Question 42

Question:   The physical quantity describing motion and whose measure is the product of distance travelled and the time taken to travel that distance is ________.

1.	speed
2.	mass
3.	weight
4.	displacement

 

Answer:   1

Question 43

Question:   If you are travelling with a velocity of 25 m/s, how long will you take to travel 700 m?

1.	25 s
2.	28 s
3.	25 min
4.	2.8 s

 

Answer:   2

Question 44

Question:   Name the instrument used to measure instantaneous speed of a vehicle.

1.	accelerator
2.	speedometer
3.	ammeter
4.	multimeter

 

Answer:   2

Question 45

Question:   A body covers a distance S in time t. What is its speed?

1.	S/t
2.	t/S
3.	S x t
4.	Zero

 

Answer:   1