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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. 150mb. 175mc. 200md. 300m |
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Answer» 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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