Two blocks are placed on a wedge with coefficients of friction being different for two blocks. Choose the correct option (friction is not sufficient to prevent the motion). |
A block of mass \[{{m}_{A}}=4\,\,kg\] is kept over another block of mass \[{{m}_{B}}=8\,kg\] which is kept on a smooth horizontal surface. The coefficient of friction between the blocks is 0.4. A time varying horizontal force \[F=4t\] is applied at \[t=0\] on 4 kg mass. Then the acceleration time graph of the masses A and B is \[(g=10\,m/{{s}^{2}})\] |
Let \[\frac{1}{2\sqrt{3}}\sec \] be the coefficient of friction between blocks of mass m and M. The pulleys are frictionless and strings are massless. Acceleration of mass m is |
The masses of the blocks A and B are 0.5 kg and 1 kg respectively. These are arranged as shown in the figure and are connected by a massless string. The coefficient of friction between all contact surfaces is 0.4. The force, necessary to move the block B with constant velocity, will be \[(g=10\,m/{{s}^{2}})\] |
A horizontal force of 10 N is necessary to just hold a block stationary against a wall. The coefficient or friction between the block and the wall is 0.2. The weight of the block is : \[\left( g=10\text{ }m/{{s}^{2}} \right)\] |
If the coefficient of friction between A and B is \[{{m}_{2}}\], the maximum horizontal acceleration of the wedge A for which B will remain at rest with respect to the wedge is: |
A bead of mass m is located on a parabolic wire with its axis vertical and vertex directed towards downward as in figure and whose equation is\[{{x}^{2}}=ay\]. If the coefficient of friction is \[{{M}_{1}}\] the highest distance above the x-axis at which the particle will be in equilibrium is |
A block is given velocity 10 m/s along the fixed inclined as shown in figure from the bottom of the inclined plane. Find the total distance travelled along the inclined plane, if the coefficient of friction is equal to 0.5: |
A block of mass 10 kg is kept on the fixed incline having coefficient of friction 0.8. Find the force of friction exerted on the block by inclined: |
A block of mass 15 kg is resting on a rough inclined plane as shown in figure. The block is tied up by a horizontal string which has a tension of 50 N. The coefficient of friction between the surfaces of contact is \[\left( g=10\text{ }m/{{s}^{2}} \right)\] |
Car is accelerating with acceleration = 20 m/s2. A box of mass m = 10 kg that is placed inside the car it is put in contact with the vertical wall of car as shown. The friction coefficient between the box and the wall is \[\mu =0.6\]. |
With reference to the figure shown, if the coefficient of friction at the surfaces is 0.42, then the force F required to pull out the 6.0 kg block with an acceleration of 1.50 \[m\text{/}{{s}^{2}}\] will be: |
A block of mass m is attached with massless spring of force constant k. The block is placed over a fixed rough inclined surface for which the coefficient of friction is \[\mu =3/4.\] The block of mass m is initially at rest. The block of mass M is released from rest with spring in unstretched state. The minimum value of M required to move the block up the plane is (neglect mass of string and pulley and friction in pulley.) |
Two masses A and B of 10 kg and 5 kg are connected with a string passing over a frictionless pulley fixed at the corner of a table (as shown in figure). The coefficient of friction between the table and block is 0.2. The minimum mass of C that maybe placed on A to prevent it from moving is equal to |
A block of mass m lying on a rough horizontal plane is acted upon by a horizontal force\[P\]and another force Q is inclined at an angle\[\theta \]to the vertical. The block will remain in equilibrium, if the coefficient of friction between it and the surface is |
String is massless and pulley is smooth in the adjoining figure total mass or left hand side of the pulley side of the pulley is \[{{m}_{1}}\] and on right hand side is \[{{m}_{2}}\] . Friction coefficient between block B and the wedge is \[\mu =\frac{1}{2}\] and \[\theta =30{}^\circ \] Select the wrong answer |
Mass of block A is 10 kg. Coefficient of friction between the block A and surface is 0.3. What is the maximum values of M for which system remains in equilibrium \[\left( g=10m/{{s}^{2}} \right)\] |
A particle is projected on a rough horizontal ground along positive x-axis from x = 0, with an initial speed of \[{{\text{V}}_{\text{0}}}\] The friction coefficient to the ground varies with x as Here K is a positive constant. The particle comes to rest at x equal |
The member OA rotates about a horizontal axis through O with a constant counter clockwise velocity \[\omega =3\] \[\text{rad}/\text{sec}\]. As it passes the position\[\theta ={{0}^{o}}\], a small mass m is placed upon it at a radial distance r = 0.5 m. If the mass is observed to slip at \[\theta ={{37}^{o}}\], the coefficient of friction between the mass & the member is: |
Two blocks (m and M) are arranged as shown in Fig. 21. If there is friction between ground and M only and other surfaces are frictionless. The coefficient of friction between ground and M is \[\mu =0.75\] . The maximum ratio of m and M (m/M) so that the system remains at rest is |
A 40 kg slab rests on a frictionless floor as shown in the figure. A 10 kg block rests on the top of the slab. The static coefficient of friction between the block and slab is 0.60 while the kinetic friction is 0.40. The 10 kg block is acted upon by a horizontal force 100 N. If \[g=9.8\,m/{{s}^{2}},\]the resulting acceleration of the slab will be |
A cart of mass M has a block of mass m attached to it as shown in fig. The coefficient of friction between the block and the cart is u. What is the minimum acceleration of the cart so that the block m does not fall? |
In the arrangement shown in the figure. The mass of wedge A and that of the block B are 3m and in respectively. Friction exists between A and B only. The mass of the block C is m. |
The force F = 19.5 m x g is applied on the block C as shown in the figure. The minimum coefficient of friction (\[\mu \]) between A and B so that B remains stationary with respect to wedge A will be |
A worker piles up sand onto a circular area of radius R. No sand is to spill onto the surrounding area. The coefficient of friction of sand on sand is \[\mu \]. The greatest volume of the sand that can be stored in the manner is |
You need to login to perform this action.
You will be redirected in
3 sec