Physics-
General
Easy
Question
Blocks 
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
- (A) & (B) are true
- (A) true (B) false
- (A) & (B) are false
- (A) false (B) true.
The correct answer is: (A) true (B) false
Related Questions to study
physics-
Two blocks of masses m and M are kept on a rough horizontal surface. The coefficient of friction between M and m is 
and between M and ground is 
. If both the blocks are pushed horizontally in same direction with equal speed 
.
Two blocks of masses m and M are kept on a rough horizontal surface. The coefficient of friction between M and m is and between M and ground is . If both the blocks are pushed horizontally in same direction with equal speed .
physics-General
physics-
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
physics-
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. 
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.
physics-General
physics-
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
physics-
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 
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 is the coefficient of friction time after which the two bodies collide is
physics-General
physics-
A block of mass 
is placed on another block of mass M which itself is lying on a horizontal surface. The coefficient of friction between two blocks is and that between the block of mass M and horizontal surface is . What maximum horizontal force can be applied to the lower block so that the two blocks move without separation ?
A block of mass is placed on another block of mass M which itself is lying on a horizontal surface. The coefficient of friction between two blocks is and that between the block of mass M and horizontal surface is . What maximum horizontal force can be applied to the lower block so that the two blocks move without separation ?
physics-General
physics-
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 
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 at the same time in the direction as shown. Find the correct graph :
physics-General
physics-
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
physics-
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
physics-
A force 
acts on the block so as to slide it on the rough horizontal floor. It is impossible to push the block if 
is equal to : ( 
coefficient of friction between block and horizontal floor)
A force acts on the block so as to slide it on the rough horizontal floor. It is impossible to push the block if is equal to : ( coefficient of friction between block and horizontal floor)
physics-General
physics-
A car is going at a speed of 6 m/s when it encounters a 15 m slope of angle 30° The friction coefficient between the road and tyre is 0.5. The driver applies the brakes. The minimum speed of car with which it can reach the bottom is :
A car is going at a speed of 6 m/s when it encounters a 15 m slope of angle 30° The friction coefficient between the road and tyre is 0.5. The driver applies the brakes. The minimum speed of car with which it can reach the bottom is :
physics-General
physics-
The minimum value of mass for which the 100 kg block can remain in static equilibrium is
The minimum value of mass for which the 100 kg block can remain in static equilibrium is
physics-General
physics-
A block is in equilibrium. The minimum tension in the string is 
A block is in equilibrium. The minimum tension in the string is
physics-General
physics-
A uniform rod of length L and mass M has been placed on a rough horizontal surface. The horizontal force F applied on the rod is such that the rod is just in the state of rest. If the coefficient of friction varies according to the relation 
where K is a the constant. Then the tension at mid point of rod is
A uniform rod of length L and mass M has been placed on a rough horizontal surface. The horizontal force F applied on the rod is such that the rod is just in the state of rest. If the coefficient of friction varies according to the relation where K is a the constant. Then the tension at mid point of rod is
physics-General
physics-
A man of mass 63 kg is pulling a mass M by an inextensible light rope passing through a smooth and massless pulley as shown in figure. The coefficient of friction between the man and the ground is 
. Find the maximum value of M that can be pulled by the man without slipping on the ground.
A man of mass 63 kg is pulling a mass M by an inextensible light rope passing through a smooth and massless pulley as shown in figure. The coefficient of friction between the man and the ground is . Find the maximum value of M that can be pulled by the man without slipping on the ground.
physics-General
