COMEDK Exam 2015 Solved Paper

Given, initial velocity, u=3

^

i

+4

^

j

Force, F=2

^

i

−3

^

j

Initial velocity along X-axis and Y-axis are ux=3ms−1 and uy=4ms−1, respectively.
Similarly, Fx=2N and Fy=−3N
If acceleration along X and Y-axes are ax and ay, then
ax‌=‌

Fx

m

=‌

2

1

=2m∕ s2‌‌‌‌‌‌∵∵F=ma]
ay‌=‌

Fy

m

=‌

−3

1

=−3m∕ s2
sx‌=uxt+‌

1

2

axt2=3×3+‌

1

2

×2×9=18m
sy‌=uyt+‌

1

2

ayt2=4×3+‌

1

2

×(−3)×9
‌=12−135=−15m
So, required x and y-coordinates of point =(18,−15)