Question

Fig. 2.42 given below shows a velocity-time graph
for a car starting from rest. The graph has three parts
(iii) Which part of graph shows motion with
uniform (a) velocity (b) acceleration
(i) State how is the distance travelled in any part
(ii) Compare the distance travelled in part BC with
Fig. 2.42
AB, BC and CD.
B
C
VELOCITY (ms)
12
1
2t
D
2.5 t
TIME
х
Fig. 2.42
determined from this graph.
the distance travelled in part AB.
(c) retardation ?​

Answer 1

Answer: 25 sec/ hr

Explanation:

W=  

F

⋅  

r

=  

F

⋅(  

r

 

2

​  

−  

r

 

1

​  

)

⇒W=(  

i

^

+2  

j

^

​  

+3  

k

^

)⋅((  

i

^

−  

j

^

​  

+2  

k

^

)−(  

i

^

+  

j

^

​  

+  

k

^

))

⇒W=(  

i

^

+2  

j

^

​  

+3  

k

^

)⋅(−2  

j

^

​  

+  

k

^

)

⇒W=−4+3=−1J