motion in one dimension question

7/30/2019 Motion In One Dimension Question

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QUEST TUTORIALSHead Office : E-16/289, Sector-8, Rohini, New Delhi, Ph. 65395439

Q1. To describe the motion of bodies these are generally considered size as point objects. For this which of the statements is

true

(a) the laws of motion are valid only for truly point size objects

(b) the laws of motion are valid for all bodies which move distance much larger than their own sizes

(c) the laws of motion are valid for all bodies irrespective of their sizes and the distance they move

(d) the laws of motion are valid for large bodies even if they move distance much less than their sizes

Q2. Which of the following in a closest example of motion in one dimension

(a) a train moving on a railway track

(b) a boat sailing on a lake over distances small compared to earth radius(c) a billiard ball in motion

(d) earth moving around the see

Q3. The position-time graph for an object is shown below.

This is an example of

(a) motion in one dimension

(b) motion in two dimensions

(c) motion in three dimensions

(d) stationary object

x

x0

True

Q4. Which of the graphs (velocity-time) represents uniform motion

(a)

velocity(v)

time(t) (b)

(v)

(t) (c)

(v)

(t) (d)

(v)

(t)

Q5. A body is uniform motion in one dimension moves from a position x at time t to another position at time t. Which ofthe statements is wrong for this motion.

(a) the actual distance covered in time t to t is the magnitude of displacement

(b) the velocity calculated by making any choices for t and t always gives the same result

(c) a larger value of the difference t t will give a small value of the velocity because velocity is obtained by dividing

by t t

(d) a larger value of x x will give larger value of the velocity.Q6. For a body in uniform motion in one dimension, which of the following statements is not true

(a) the body has constant speed

(b) the body has constant velocity

(c) the body has constant acceleration

(d) the body moves equal distance in equal time intervals.

Q7. Which of the graphs (positiontime) represents uniform motion in one dimension

(a)

position

(x)

time (t) (b)

x

t

(c)

x

t (d)

x

t


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Q8. For uniform motion in one dimension which f the statements is not true

(a) both speed and velocity can be positive

(b) both speed and velocity can be negative

(c) velocity can be either positive or negative but speed is always positive

(d) both speed and velocity can be zero

Q9. Which of the following graphs describing the uniform motion of two bodies (1) and (2) represents zero relative velocity

between them.

(a)

Positionx

time (t)

(2)

(1)

(b)

x

t

(2)

(1)

(c)

x

t

(2)(1)

(d)

x

t

(2)

(1)

Q10. Which of the following does not represents motion with constant acceleration

(a) time (t)

velocityv

(b) time

velocity

(c) time

velocity

(d) time

velocity

Q11. The figure below describing the motion of a body in one

dimension state which statement is not true

(a) segment AB and EF represents motion with uniform velocity

(b) segment BC represents motion with positive acceleration

(c) segment CD represents motion with constant acceleration

(d) segment DE represents motion with negative accelerationA

1

A2

AB

C

D

E F

Time

Position


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Q12. Which of the following curves describes motion with positive constant acceleration.

(a) time (t)

velocityv

(b) t

v

(c) t

v

(d) t

v

Q13. Which of the following represents motion with negative constant acceleration motion

(a) time (t)

velocityv

(b) t

v

(c) t

v

(d) t

v

Q14. Which of the following does not represent a constant acceleration motion

(a) time (t)

velocity

v

(b) time (t)

velocityv

(c) time

velocity

(d) time

velocity

Q15. A car accelerates on a straight road from rest to a speed of 50 m/s in 25 sec. The distance covered by car in this time is

(a) 1250 m (b) 625 m (c) 2 m (d) 1/2 m


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Q16. Two trains move with speeds 100 km/hr on parallel trades opposite to each other. Which statement is true

(a) The relative velocity between trains is 200 km/hr

(b) The relative velocity between train is zero

(c) The relative velocity between trains is 100 km/hr

(d) The velocity of earth relative to both trains is same

Q17. In the displacementtime graph below the ratio ofspeeds during the first two seconds and the next four

seconds i(a) 1 : 1

(b) 1 : 2

(c) 2 : 1

(d) 3 : 2

time1 2 3 4 5 6

5

10

25

displacement

20

Q18. For the velocitytime graph below what is the ratio ofthe distance covered by the body in the last two

seconds of its motion to the total distance covered

(a) 2 : 3

(b) 1 : 2

(c) 1 : 3

(d) 1 : 41 2 3 4 5 6 7

5

10

15

20

velocity

time (s)

Q19. The variation of the speed of a car with time is given

as

The maximum acceleration is in the segmentSpeed

Time

A

B

C

D

E

(a) AB (b) BC (c) CD (d) DE

Q20. A car accelerate from rest at constant rate for sometime after which it decelerate at constant rate to come to rest. Ifthe total time of motion is t, the maximum velocity acquired by the car is

(a) / + (b) + / (c) 2 + 2/() t (d) 22/() t

Q21. A train moves from rest to rest for time t, accelerating at constant rate a for sometime and then decelerating at

constant rate for the remaining time. The distance covered is

(a) t+

(b)

2t

11

+

(c)

2t

2

1

+(d)

2t

2

1

+

Q22. When a particle is in motion, its

(a) average speed is equal to the magnitude of its average velocity

(b) average velocity can never be zero

(c) average speed can never be zero

(d) average velocity is always half he sum of initial and final velocity

Q23. Two trains are heading towards each other on the same track with velocity v1 and v2 respectively. The drivers, noticing

this when the trains are at a distance apart, apply brakes, giving same acceleration to each train. The necessary

condition for no collision is

(a)( )

motion in one dimension question

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