which one is correct please give explanation
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Answer - A. 10m/s
Fx = -dU/dx
Fy = -dU/dy
formula for differentiation ,
d(ax+b)/dx = a
Fx = 3 => m . ax = 3 => ax =3
Fy = 4 => m, ay = 4 => ay = 4
used formula, F = m.a for both X and y directions
now , v = u + a.t
vx = ux + ax.t
= 0 + 3 x 2 = 6
vy = uy + ay . t
= 0+ 4 x 2 = 8
v = (vx^2 + vy^2) ^0.5
= ( 36 + 64 )^0.5
= √100
= 10 m/s
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