NEET Physics Motion of Connected Bodies Pulley and Equillibrium of Forces MCQs Set 01

Question. If rope of lift breaks suddenly, the tension exerted by the surface of lift (a = acceleration of lift)
(a) 0
(b) m(g – a)
(c) m(g + a)
(d) mg

Answer: A

Question. A monkey is climbing up a rope, then the tension in the rope
(a) must be equal to the force applied by the monkey on the rope
(b) must be less than the force applied by the monkey on the rope.
(c) must be greater than the force applied by the monkey on the rope
(d) may be equal to, less than or greater the force applied by the monkey on the rope.

Answer: A

Question. When an elevator cabin falls down, the cabin and all the bodies fixed in the cabin are accelerated with respect to
(a) man standing on earth
(b) ceiling of elevator
(c) floor of elevator
(d) man standing in the cabin

Answer: A

Question.  If two masses (M & m) are connected on a horizontal plane and a force is applied on the combination, then the tension T depends on
(a) whether force is applied on M or m
(b) the force applied on the system
(c) Can’t be predicted.
(d) both

Answer: A

Question.  A person of mass 60 kg is inside a lift of mass 940 kg and presses the button on control panel. The lift starts moving upwards with an acceleration 1.0 m/s². If g = 10 ms–2, the tension in the supporting cable is
(a) 11000 N
(b) 1200 N
(c) 9680 N
(d) 8600 N

Answer: A

Question.  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/s2, the reading of the spring balance will be
(a) 24 N
(b) 74 N
(c) 15 N
(d) 49 N

Answer: A

Question. When an elevator cabin falls down, the cabin and all the bodies fixed in the cabin are accelerated with respect to
(a) None of these
(b) man standing in the cabin
(c) floor of elevator
(d) ceiling of elevator

Answer: A