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
A balloon of mass M is descending at a constant acceleration α. When a mass m is released from the balloon it start...A man of mass 50 kg is pulling on a plank of mass 100 kg kept on a smooth floor as shown with force of 100 N. If both ma...A bob is hanging over a pulley inside a car through a string. The second end of the string is in the hand of a person st...A body of mass 2 kg moving on a horizontal surface with an initial velocity of 4 m/s comes to rest after 2 sec. If one w...In the arrangement show in figure m1=1kg, m2=2kg. pulleys are mass less and strings are light. For What value of M the m...