Applied Mechanics - Engineering

Q1:

If two forces P and Q (P > Q) act on the same straight line but in opposite direction, their resultant, is

A P + Q

B P/Q

C Q/P

D P - Q

E Q - P.

ANS:D - P - Q

p^2+q^2+2pqcos(angle) = r^2 here angle = 180 cos180 = (-1) so r=p-q.