N Initial speed of box, u=0ms−1 Time, t=10s Let acceleration of box is a and displacement along X-axis after 10s is Sx. As, ‌‌F=ma ⇒‌‌a=F∕m=‌20
∧
i
+10
∧
j
2
=(10
∧
i
+5‌
∧
j
)‌ms−2 By second equation of motion along X-axis, ‌sx=uxt+‌
1
2
axt2 ‌sx=0+‌
1
2
×10×(10)2=500m Hence, displacement along X-axis after 10s is 500m.