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Displacement=area under v-t graph = 150m

using another concept,

the acceleration is 0.75m^s-2, so the displacement at

1s=0.75m

2s=0.75*2m

.

.

.

20s=0.75*20m

total displacement =sum of displacement of every second

=0.75*(1+2+3+...+18+19+20)

=157.5m

Can you tell me wt's wrong here?

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# Homework Help: Triangular numbers and v-t graph

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