Question

The given figure shows three blocks in contact and kept on a smooth horizontal surface. What is the ratio of force exerted by block A on B to that of B on C?

• A. 3:1
• B. 1:3
• C. 2:3
• D. 3:2

Answer 1

The correct option is A 3:1

All the block will move with same acceleration given by,
$a=16/(5+2+1)$
Now, force on A by B will be given by
$F=16-(5\ast 2)$N
$F=6$N
Again force on B by C will be given by,
$F=6-(2\ast 2)$N
$F=2$ N
Ratio will be 3:1