Question

Model trains move along a track passing through two model stations. Students analyze the motion of a train. They start a digital timer as the train starts to move. They record the time that it enters Station A and the time it enters Station B.
A B
00:01:22 00:02:34

Calculate the time taken from the train entering Station A to the train entering Station B. State your answer in seconds.

Time taken= ????

Answer 1

Answer:

Correct option is

B

160 kmhr

−2

,10 km

Maximum acceleration will occur in the region with maximum slope.

From the given curve region CD is having the maximum curve.

Thus, maximum acceleration=

change in distance

change in velocity

=

0.25

60−20

=160

Now, total area under the curve between 0.75 to 1.00 hrs is given by

(

2

1

×0.25×40)+(20×0.25)=10km