Force and Motion — Physics MCQs (Class 11)
Free chapter-wise Physics MCQs with answers for MDCAT, FSc and entry tests.
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#33 Methematically newton's 1st law of motion can be expressed in the form of
A) F = Δp/Δt
B) F =ma
C) P =mV
D) F =0 and a=0
#34 The time rate of change of linear momentum of freely falling object is equal to
A) Impulse
B) Kinetic energy
C) Weight
D) Power
#35 Two blocks of masses 2kg and 3kg placed in contant are acted upon by a force of 50N. The acceleration of 1.0kg mass will be
A) 40m/s2
B) 10m/s2
C) 30m/s2
D) 50m/s2
#36 Action and reaction pairs are formed at a
A) Single body
B) Pair of bodies
C) Both single and pair of bodies
D) None
#37 A bullet of mass 100g leaves the gun of mass 10kg, with a muzzle speed of 100 m/s. The speed of recoil of a gun is
A) 10m/s
B) 102m/s
C) 102cm/s
D) 1m/s
#38 A slow moving proton of speed V, interacts head on with uranium stationary nucleus. The velocity of proton after interaction is
A) 
B) ¯
C) ¯ 2
D) ¯ /2
#39 A 30gm carom striker moving with velocity of 10cm/s srikes a 5gm stationary carom disc head in elastically. The striker momentum gained by the disc is
A) 30gm-cm/s
B) 120gm-cm/s
C) 50gm-c/s
D) 150gm-cm/s
#40 Body rolls down an inclined plane having angle 30° with horizantal, its acceleration is;
A) 9.8m/s2
B) 4.9m/s2
C) 2.8m/s2
D) None
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