1
AIEEE 2003
+4
-1
A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads $$49$$ $$N,$$ when the lift is stationary. If the lift moves downward with an acceleration of $$5 m/{s^2}$$, the reading of the spring balance will be
A
$$24$$ $$N$$
B
$$74$$ $$N$$
C
$$15$$ $$N$$
D
$$49$$ $$N$$
2
AIEEE 2003
+4
-1
A light spring balance hangs from the hook of the other light spring balance and a block of mass $$M$$ $$kg$$ hangs from the former one. Then the true statement about the scale reading is
A
Both the scales read $$M$$ $$kg$$ each
B
The scale of the lower one reads $$M$$ $$kg$$ and of the upper one zero
C
The reading of the two scales can be anything but the sum of the reading will be $$M$$ $$kg$$
D
Both the scales read $$M/2$$ $$kg$$ each
3
AIEEE 2003
+4
-1
A marble block of mass $$2$$ $$kg$$ lying on ice when given a velocity of $$6$$ $$m/s$$ is stopped by friction in $$10$$ $$s.$$ Then the coefficient of friction is
A
$$0.02$$
B
$$0.03$$
C
$$0.04$$
D
$$0.06$$
4
AIEEE 2003
+4
-1
A block of mass $$M$$ is pulled along a horizontal frictionless surface by a rope of mass $$m.$$ If a force $$P$$ is applied at the free end of the rope, the force exerted by the rope on the block is
A
$${{Pm} \over {M + m}}$$
B
$${{Pm} \over {M - m}}$$
C
$$P$$
D
$${{PM} \over {M + m}}$$
EXAM MAP
Medical
NEET