Ans: (b)
26.A man (astronaut) can apply a more longer jump on the moon"s surface than
   the earth"s surface, because: [RRB CC 2003]
   (a) he is weightless on the moon
   (b) there exists no atmosphere on the moon
   (c) the gravitational pull on the moon is lesser than that of the earth"s surface
   (d) the moon is smaller than the sun
Ans: (c)
27.The weight of an object of mass 1 kg can be expressed as : [RRB TC/CC
   (a) 1N
   (b) 10N
   (c) 9.8 N
   (d) 9N
Ans: (c)
28.The product of the moment of inertia and the angular acceleration is : [RRB
   (a) force
   (b) torque
   (c) work
   (d) angular momentum
Ans: (b)
29.A body is charged negatively. It implies that: [CDS 2011]
   (a) it has lost some of its protons
   (b) it has acquired some electrons from outside
   (c) it has lost some of its electrons
   (d) none of the above
Ans: (b)
30.A piece of ice is floating on the surface of the water kept in a beaker and
   when this piece melts then the level of the water in the beaker: [RRB
   ASM/GG 2004]
   (a) will increase