The acceleration of the car at t=4 seconds is 5 m/s^2.
The acceleration is the change of velocity with time. Hence, we can write;
a = Δv/Δt
Where;
a = acceleration
v = velocity
t = time
If we read of the graph, we can see that the car moved from point (0, 0) to point (4, 20).
Hence;
The acceleration of the car is;
a = 20 - 0/4 - 0
a = 5m/s^2
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