The force acting on any particle is mass(m) times acceleration(a).
Here, we need to find the acceleration from the above graphs.
From the x-t graph, we can see the relation that
And from the y-t curve,
ax = x’’ = 0 m s-2
ay = y’’ = 2 ms-2
So, the force is
Fx = 0
Fy = m x 2 = 0.5 x 2 = 1 N
Hence the force is 1N and is along y-axis.
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