Question

Distance (cm) -
ON A 0 0
0+ ----
2
3
7
8
9
4 5 6
Time (s) -
53. The graph given alongside shows the positions of a body at different times.
Calculate the speed of the body as it moves from:
(i) A to B,
(ii) B to C, and
(iii) C to D.
54. What can you say about the motion of a body if :
(a) its displacement-time graph is a straight line to veloce
(b) its velocity-time graph is a straight line?
55. A body with an initial velocity x moves with a uniform acceleration y. Plot
its velocity-time graph. S
56. Given alongside is the velocity-time graph for a moving body:
Find : (i) Velocity of the body at point C.1oCM
(ii) Acceleration acting on the body between A and B.
(iii) Acceleration acting on the body between B and C.
57. A body is moving uniformly in a straight line with a velocity
of 5 m/s. Find graphically the distance covered by it in 5
seconds.
0 1
58. The speed-time graph of an ascending passenger lift is given
alongside.
What is the acceleration of the lift:
(i) during the first two seconds ?
(ii) between second and tenth second ?
(iii) during the last two seconds ?
59. A car is moving on a straight road with uniform
acceleration. The speed of the car varies with time as
follows:
: 0 2 4
Time (s)
6 8 10
A
Velocity (in km/h)
2
3
7
8
9
4 5 6
Time (in hrs) -
Speed, v (m/s) -​

Answer 1

Answer:

(i) The distance covered from A to B is (3−0)=3cm

Time taken to cover the distance from A to B=(5−2)=3s

Speed=TimeDistance

Speed=3sec3cm=1cm/s

(ii) The speed of the body as it moves from B to C is zero. 

(iii) The distance covered from C to D is (7−3)=4cm

Time taken to cover the distance from C to D=(9−7)=2s

Speed=TimeDistance=2sec4cm=2cm/s