Vectors and Equilibrium — Physics MCQs (Class 11)
Free chapter-wise Physics MCQs with answers for MDCAT, FSc and entry tests.
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#177 When the mass and speed of a body are doubled K.E of body would
A) Become 4 times
B) Become 8 times
C) Become 6 time
D) Remain unchanged
#178 When a fighter plane chasing another plane opens fire, its speed
A) Increases
B) Remains same
C) Decreases
D) First decreases then increases
#179 If two forces inclined at 120° with each other are acting on a body of mass m, then the acceleration produced in the body will be
A) $F/m$
B) $\sqrt{3}F/m$
C) $2F/m$
D) $F/\sqrt{2}m$
#180 At the highest point on the trajectory of a projectile, its
A) Potential energy is minimum
B) Kinetic energy is maximum
C) Total energy is maximum
D) Kinetic energy is minimum
#181 If air is considered, then the maximum height achieved by the projectile
A) Decreases
B) Increases
C) Remains same
D) Very difficult to answer as no data provided
#182 Motion along A B is
A) Accelerated
B) Retarded
C) Uniform velocity
D) Circular
#183 If velocity time graph is a straight line parallel to time axis then body is
A) Moving with zero acceleration
B) Moving with constant velocity
C) Covering equal displacement in equal intervals of time
D) All of these
#184 Two masses of 1 g and 4 g are moving with equal kinetic energies. The ration of the magnitudes of their linear momenta is
A) 4 : 1
B) 2:1
C) 1 : 2
D) 1 : 16
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