Cengage JEE Mains Physics by B.M Sharma
A block of mass m is rest with respect to a rough incline kept in elevator moving up with acceleration: Which of following statements is correct ?
20
Oct
A block of mass m is rest with respect to a rough incline kept in elevator moving up with acceleration: Which of following statements is correct ? A block of mass m is rest with respect to a rough incline kept in elevator moving up with acceleration: Which of following statements is correct ? October [...]
A passenger is traveling a train moving at 40ms^−1 Hit suitcase is kept on the berth ,The drive of train applies breaks such that the speed of the train decreases at a constant rate to 20ms^−1 in 5s What should be the minimum coefficient of friction between the suitcase and the berth if the suitcase is not to slide during and retardation of the train ?
20
Oct
A passenger is traveling a train moving at 40ms^−1 Hit suitcase is kept on the berth ,The drive of train applies breaks such that the speed of the train decreases at a constant rate to 20ms^−1 in 5s What should be the minimum coefficient of friction between the suitcase and the berth if the suitcase [...]
A body of mass M is resting on a rough horizontal plane surface the coefficient of friction being equal to μ At t=0 a horizontal force F=F0t starts acting on it , where F0 is a constant find the time T at which the motion starts?
20
Oct
A body of mass M is resting on a rough horizontal plane surface the coefficient of friction being equal to μ At t=0 a horizontal force F=F0t starts acting on it , where F0 is a constant find the time T at which the motion starts? A body of mass M is resting on a [...]
The system is pushed by a force F as shown in fig. All surfaces are smooth except between B and C. Friction coefficient between B and C is μ.. Minimum value of F to prevent block B from down ward slipping is:
20
Oct
The system is pushed by a force F as shown in fig. All surfaces are smooth except between B and C. Friction coefficient between B and C is μ.. Minimum value of F to prevent block B from down ward slipping is: each of mass m. The system is released from rest. If accelerations of [...]
Two block of masses M1andM2 are connected with a string passing over a pulley as shown in figure The block M1 lies on a horizontal surface friction between the block M1 and the horizontal surface is μ The system accelerates. What additional mass m should be placed on the block M1 so that the system does not accelerate ?
20
Oct
Two block of masses M1andM2 are connected with a string passing over a pulley as shown in figure The block M1 lies on a horizontal surface friction between the block M1 and the horizontal surface is μ The system accelerates. What additional mass m should be placed on the block M1 so that the system [...]
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 u1 and that between the block of mass M and the horizontal surface is u2. What is maximum horizontal force can be applied to the lower block so that the two blocks move without separation?
20
Oct
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 u1 and that between the block of mass M and the horizontal surface is u2. What is maximum horizontal force can be applied to the lower [...]
Blocks A and B in the Fig are connected by a bar of negligible weight .Mass of each block is 170 kg and μA=0.2 and μB=0.4 where μA and μBare the coefficient of limiting friction between block and plane calculate the force developed in the bar(g=10ms^−2)
20
Oct
Blocks A and B in the Fig are connected by a bar of negligible weight .Mass of each block is 170 kg and μA=0.2 and μB=0.4 where μA and μBare the coefficient of limiting friction between block and plane calculate the force developed in the bar(g=10ms^−2) each of mass m. The system is released from [...]
A horizontal force, just sufficient to move a body of mass 4kg lying on a rough horizontal surface is applied on it. The coefficients of static and kinetic friction between the body and the surface are 0.8 and 0.6 respectively. If the force continues to act even after the block has started moving, the acceleration of the block in ms^−2 is (g = 10 ms^−2 )
20
Oct
A horizontal force, just sufficient to move a body of mass 4kg lying on a rough horizontal surface is applied on it. The coefficients of static and kinetic friction between the body and the surface are 0.8 and 0.6 respectively. If the force continues to act even after the block has started moving, the acceleration [...]
A block of mass 15kg is resting on a rough inclined plane as shown in figure ,The block is tied by a horizontal string which has a tension 50 N The coefficient of friction between the surfaces of contact is
20
Oct
A block of mass 15kg is resting on a rough inclined plane as shown in figure ,The block is tied by a horizontal string which has a tension 50 N The coefficient of friction between the surfaces of contact is A block of mass 15kg is resting on a rough inclined plane as shown in [...]
A box of mass 8kg placed on a rough inclined plane of inclination θ its downward motion can be prevented by applying an upward pull F and it can be made to slide upward applying a force 2F .The coefficient of friction between the box and the inclined plane is
19
Oct
A box of mass 8kg placed on a rough inclined plane of inclination θ its downward motion can be prevented by applying an upward pull F and it can be made to slide upward applying a force 2F .The coefficient of friction between the box and the inclined plane is each of mass m. The [...]