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Physics-

General

Easy

Question

Two rough blocks A and B, A placed over B, move with acceleration $stack a with rightwards arrow on top A$ and $stack a with rightwards arrow on top B$ , velocities $stack v with rightwards arrow on top A$ and $stack V with rightwards arrow on top subscript B end subscript$ by the action of horizontal forces $stack F with rightwards arrow on top subscript A end subscript$ and $stack F with rightwards arrow on top subscript B end subscript$ respectively. When no friction exists between the blocks A and B at all times

$v_{A} = v_{B}$
$a_{A} = a_{B}$
$a_{A} \neq a_{B}$
$\frac{F_{A}}{m_{A}} = \frac{F_{B}}{m_{B}}$ and $v_{A} = v_{B}$

The correct answer is: $fraction numerator F subscript A end subscript over denominator m subscript A end subscript end fraction equals fraction numerator F subscript B end subscript over denominator m subscript B end subscript end fraction$ and $v subscript A end subscript equals v subscript B end subscript$

Related Questions to study

In the figure, $m subscript A end subscript equals 2 text end text k g$ and $m subscript B end subscript equals 4 text end text k g$ . For what minimum value of F, A starts slipping over B: $open parentheses g equals 10 text end text m divided by s to the power of 2 end exponent close parentheses$

In the figure, $m subscript A end subscript equals 2 text end text k g$ and $m subscript B end subscript equals 4 text end text k g$ . For what minimum value of F, A starts slipping over B: $open parentheses g equals 10 text end text m divided by s to the power of 2 end exponent close parentheses$

physics-General

The coefficient of static friction between the two blocks is $mu$ and the table is smooth. The maximum horizontal force that can be applied to the block of mass M so that the blocks move together is

The coefficient of static friction between the two blocks is $mu$ and the table is smooth. The maximum horizontal force that can be applied to the block of mass M so that the blocks move together is

physics-General

Two blocks are moving under the action of external force F and 2F. The force of friction between the blocks so that they move without any relative sliding between them is :

Two blocks are moving under the action of external force F and 2F. The force of friction between the blocks so that they move without any relative sliding between them is :

physics-General

parallel

Two block of masses $m subscript 1 end subscript$ and $m subscript 2 end subscript$ are connected with a massless unstretched spring and placed over a plank moving with an acceleration 'a' as shown in figure. The coefficient of friction between the blocks and platform is $mu$ .

Two block of masses $m subscript 1 end subscript$ and $m subscript 2 end subscript$ are connected with a massless unstretched spring and placed over a plank moving with an acceleration 'a' as shown in figure. The coefficient of friction between the blocks and platform is $mu$ .

physics-General

Blocks $A & text end text B$ are moving together on Rough horizontal surface.
A) Friction between A and B static in nature
B) Friction between A and horizontal surface is static in nature

Blocks $A & text end text B$ are moving together on Rough horizontal surface.
A) Friction between A and B static in nature
B) Friction between A and horizontal surface is static in nature

physics-General

Two blocks of masses m and M are kept on a rough horizontal surface. The coefficient of friction between M and m is $mu subscript 1 end subscript$ and between M and ground is $mu subscript 2 end subscript$ . If both the blocks are pushed horizontally in same direction with equal speed $v subscript 0 end subscript$ .

Two blocks of masses m and M are kept on a rough horizontal surface. The coefficient of friction between M and m is $mu subscript 1 end subscript$ and between M and ground is $mu subscript 2 end subscript$ . If both the blocks are pushed horizontally in same direction with equal speed $v subscript 0 end subscript$ .

physics-General

parallel

What should be the coefficient of friction between blocks A and B so that blocks do not move ? The masses

What should be the coefficient of friction between blocks A and B so that blocks do not move ? The masses

physics-General

Two blocks A and B of mass 10 kg and 20 kg respectively are placed as shown in figure. Coefficient of friction between all the surfaces is 0.2. Then find tension in string and acceleration of block B. $open parentheses g equals 10 text end text m divided by s to the power of 2 end exponent close parentheses$

Two blocks A and B of mass 10 kg and 20 kg respectively are placed as shown in figure. Coefficient of friction between all the surfaces is 0.2. Then find tension in string and acceleration of block B. $open parentheses g equals 10 text end text m divided by s to the power of 2 end exponent close parentheses$

physics-General

Blocks A of mass 3 kg and B of mass 1 kg rest on rough horizontal floor as shown in the figure. The coefficient of friction between the floor and A is 0.4 and that between A and B is 0.3. The minimum force required to move the block A away from the wall is

Blocks A of mass 3 kg and B of mass 1 kg rest on rough horizontal floor as shown in the figure. The coefficient of friction between the floor and A is 0.4 and that between A and B is 0.3. The minimum force required to move the block A away from the wall is

physics-General

parallel

A wooden block with mass 2 m is attached to the shaft of an electric motor mounted on a plank free to move on the floor. The mass of the plank and motor is m. The initial seperation between the block and motor is l. When the motor is switched on, block moving with acceleration a. If $mu$ is the coefficient of friction time after which the two bodies collide is

A wooden block with mass 2 m is attached to the shaft of an electric motor mounted on a plank free to move on the floor. The mass of the plank and motor is m. The initial seperation between the block and motor is l. When the motor is switched on, block moving with acceleration a. If $mu$ is the coefficient of friction time after which the two bodies collide is

physics-General

A block of mass $m$ is placed on another block of mass M which itself is lying on a horizontal surface. The coefficient of friction between two blocks is $mu subscript 1 end subscript$ and that between the block of mass M and horizontal surface is $mu subscript 2 end subscript$ . What maximum horizontal force can be applied to the lower block so that the two blocks move without separation ?

A block of mass $m$ is placed on another block of mass M which itself is lying on a horizontal surface. The coefficient of friction between two blocks is $mu subscript 1 end subscript$ and that between the block of mass M and horizontal surface is $mu subscript 2 end subscript$ . What maximum horizontal force can be applied to the lower block so that the two blocks move without separation ?

physics-General

Two blocks A and B of same mass are placed at the two ends of a plank C, which is placed on a smooth floor. The coefficient of friction between A and C and B and C is same and A and B both are given same velocity $V subscript 0 end subscript$ at the same time in the direction as shown. Find the correct graph :

Two blocks A and B of same mass are placed at the two ends of a plank C, which is placed on a smooth floor. The coefficient of friction between A and C and B and C is same and A and B both are given same velocity $V subscript 0 end subscript$ at the same time in the direction as shown. Find the correct graph :

physics-General

parallel

Two blocks, one of mass A=1 kg and another B=2 kg are shown in figure. A force of 5 N is applied on A. Coefficient of friction between A and B is 0.2 and that between B and horizontal surface is zero. Find the time taken for the front face of A to coincide with that of B

Two blocks, one of mass A=1 kg and another B=2 kg are shown in figure. A force of 5 N is applied on A. Coefficient of friction between A and B is 0.2 and that between B and horizontal surface is zero. Find the time taken for the front face of A to coincide with that of B

physics-General

The wall is rough but the contact surface between A and B is smooth. A force F is applied horizontally on B. The friction of A towards wall side in equilibrium will be :

The wall is rough but the contact surface between A and B is smooth. A force F is applied horizontally on B. The friction of A towards wall side in equilibrium will be :

physics-General

A force $F$ acts on the block so as to slide it on the rough horizontal floor. It is impossible to push the block if $theta$ is equal to : ( $mu equals$ coefficient of friction between block and horizontal floor)

A force $F$ acts on the block so as to slide it on the rough horizontal floor. It is impossible to push the block if $theta$ is equal to : ( $mu equals$ coefficient of friction between block and horizontal floor)

physics-General

parallel

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