An object travels at constant speed of 10m/s for 10s. During the next 5s, it accelerates uniformly to 20 m/s.
What is the total distance travelled by the object?
a. 150m
b. 175m
c. 200m
d. 300m
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Answer:
Option (b.) 175m
Explanation:
travels at 10m/s for 10 s.
accelerates to 20 m/s in 5s
distance = area under graph = triangle(slope) + rectangle
area under slope = 0.5(5 x 10) = 25m
Ar(rectangle) = L x B = 15 x 10 = 150m
Total distance travelled = 150 = 25 = 175m
Option (b.) 175m
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