Motion in one dimensionsQ.10. The variation of velocity of a particle moving along straight line is shown in figure. The distance traversed by the

body in 4 seconds is

[1] 70 m[2] 60 m[3] 40 m[4] 55 m

Q.11. The displacement y (in metres) of a body varies with time (in seconds) according to the equation

22y t 16t 23

= + +. How long does the body come to rest?

[1] 8 seconds [2] 10 seconds [3] 12 seconds [4] 14 seconds

Q.12. If y denotes the displacement and t denotes the time and the displacement is given by y asin t= , the velocityof the particle is

[1] acos t [2] acos t [3] a cos t [4] ( )acos t

Q.13. A truck travelling due to North at 20 m/s turns East and travels at the same speed. The change in its velocity is

[1] 20 2 m / sNorth East [2] 20 2 m / sSouth East

[3] 40 2 m / sNorth East [4] 20 2 m / sNorth West

Q.14. Which one of the following equations represent the motion of a body with finite constant acceleration. In theseequations y denotes the displacement of the body at time t and a,b and c are the constant of the motion

[1] y = ta

+ bt [2] y at= [3] 2y at bt= + [4] 2 3y at bt ct= + +

Q.15. A car moving at 12 m/s due east attains a speed 16 m/s towards north in 4 seconds. The magnitude of its averageacceleration in m/s2 is

[1] 1 m/s2 [2] 3 m/s2 [3] 5 m/s2 [4] 7 m/s2

Q.16. Adjacent graph shows the variation of velocity of a rocket with time. Find the time of burning of fuel from the graph[1] 10 sec

[2] 110 sec

[3] 120 sec

[4] cannot be estimated from the graphQ.17. The adjoining curve represents the velocity-time graph of a particle, its acceleration values along OA, AB and BC

in metre/sec2 are respectively

[1] 1,0,0.5[2] 1,0,0.5[3] 1,1,0.5[4] 1,0.5,0

Time (second)Velo

city

in m

/s

110

120

1000

10

y

x

1 2 3 4O

10

20

velo

city

(m

/se

c)

Time (sec)

A B

2010 30 40C

5

10

ve

loci

ty in

m

/sec

Time in sec