Practice Pakistan questions with answers and explanations.
Choose an option to check your answer.
Weight is W=mg.
W=7×10 = 70 N.
Choose an option to check your answer.
Vertical equilibrium requires normal force to balance weight.
N=mg=10×10 = 100 N.
Choose an option to check your answer.
Acceleration is change in velocity divided by time.
(5-20)/3 = -5 m/s².
Choose an option to check your answer.
Use s=ut+½at² with u=0.
S=½×2×25 = 25 m.
Choose an option to check your answer.
Use s=ut+½at².
S=10×5+½×2×25 = 50+25 = 75 m.
Choose an option to check your answer.
Use v²=u²+2as.
100-16 = 42a, so a=2 m/s².
Choose an option to check your answer.
Starting from rest, v=gt.
V=10×2 = 20 m/s.
Choose an option to check your answer.
Use s=½gt².
S=½×10×9 = 45 m.
Choose an option to check your answer.
At maximum height, final vertical velocity is zero.
0=20-10t gives t=2 s.
Choose an option to check your answer.
Use v²=u²-2gh with v=0.
0=400-20h, so h=20 m.
Choose an option to check your answer.
Noble gases have filled valence shells in their common ground states.
They are generally unreactive.
Choose an option to check your answer.
A single bond has order one, double bond two, and triple bond three.
Higher bond order generally means shorter, stronger bonds.
