Question

ar track of diameter
covered and the
end B of a straight
1. An athlete completes one round of a circular track of
200 m in 40 s. What will be the distance covered a
displacement at the end of 2 minutes 20 s?
Joseph jogs from one end A to the other end B of a
300 m road in 2 minutes 30 seconds and then turns a
and jogs 100 m back to point C in another 1 minute. Whe
Joseph's average speeds and velocities in jogging (a) from a
B and (b) from A to C?
Abdul, while driving to school, computes the average speed for
his trip to be 20 km h . On his return trip along the same
route, there is less traffic and the average speed is
30 km hl. What is the average speed for Abdul's trip?
A motorboat starting from rest on a lake accelerates in a straight
line at a constant rate of 3.0 ms for 8.0 s. How far does the
boat travel during this time?
A driver of a car travelling at 52 km h' applies the brakes and
accelerates uniformly in the opposite direction. The car stops
in 5 s. Another driver going at 3 km h-' in another car applies
his brakes slowly and stops in 10 s. On the same graph paper,
plot the speed versus time graphs for the two cars. Which ol
the two cars travelled farther after the brakes were applied
Fig 8.11 shows the distance-time graph of three objects A,
and C. Study the graph and answer the following questio
12
distance (km) -
1.6
0.4 0.8 1.2
time (hour)
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Answer 1

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