AIPMT | 2015Laws of MotionHard
Question
Three blocks A, B and C of masses 4 kg, 2 kg and 1 kg respectively, are in contact on a frictionless surface, as shown. If a force of 14 N is applied on the 4 kg block, then the contact force between A and B is :
Options
A.6 N
B.8 N
C.18 N
D.2 N
Solution
Acceleration of system =
=
= 2 m/s2
The contact force between 4 kg & 2 kg block will
move 2 kg & 1 kg block with the same acceleration
so Fcontact = (2 + 1)a = 3(2) = 6N
Hence option (1)
=
= 2 m/s2The contact force between 4 kg & 2 kg block will
move 2 kg & 1 kg block with the same acceleration
so Fcontact = (2 + 1)a = 3(2) = 6N
Hence option (1)
Create a free account to view solution
View Solution FreeMore Laws of Motion Questions
With what minimum acceleration can a fireman slides down a rope whose breaking strength is 2/3 of his weight :...In the arrangement show in figure neglect the masses of the pulley and string and also friction. The accelerations of bl...A block is dragged on smooth plane with the help of a rope which moves with velocity v. The horizontal velocity of the b...A man is at rest in the middle of a pond on perfectly smooth ice. He can get himself to the shore by making use of Newto...If masses are released from the position shown in figure then time elapsed before mass m1 collides with the floor will b...