respectively
Let as consider the next case in the previous illustration when there is no friction between ground and M . The coefficient of static and kinetic friction are mu(2) and mu(1), respectively, and force F acts upper block as shown in figure a. What is the maximum possible value of F so that the system moves together ? b . If there is releative sliding between M and m then calculate acceleration of M and m
30
Aug
Let as consider the next case in the previous illustration when there is no friction between ground and M . The coefficient of static and kinetic friction are mu(2) and mu(1), respectively, and force F acts upper block as shown in figure a. What is the maximum possible value of F so that the system [...]
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find the static friction between the blocks. Make the necessary assumptions and discuss different cases. ,
Let as consider the next case in the previous illustration when there is no friction between ground and M . The coefficient of static and kinetic friction are mu(2) and mu(1) ,
respectively ,
Two blocks m 1 and m 2 are acted upon by the forces F 1 and f2 as shown in Fig. If there is no relative sliding between the blocks and the ground is smooth ,
Infinite number of bodies, each of mass 2 kg are situated on x-axis at distance 1m, 2m, 4m, 8m, respectively, from the origin. The resulting gravitational potential due to this system at the origin will be.
29
Aug
Infinite number of bodies, each of mass 2 kg are situated on x-axis at distance 1m, 2m, 4m, 8m, respectively, from the origin. The resulting gravitational potential due to this system at the origin will be. 2m 4m 8m each of mass 2kg are situated on x-axis at distance 1m from the origin. The resulting [...]
Two blocks of masses 1 kg and 2 kg are placed in contact on a smooth horizontal surface as shown in fig. A horizontal force of 6N is applied d(a) on a 1-kg block. Find the force of interaction of the blocks.
29
Aug
Two blocks of masses 1 kg and 2 kg are placed in contact on a smooth horizontal surface as shown in fig. A horizontal force of 6N is applied d(a) on a 1-kg block. Find the force of interaction of the blocks. and between C and ground. and block C; (2) normal reactions between A [...]
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and between C and ground. ,
and block C; (2) normal reactions between A and B ,
and C of masses m 1 ,
and m 3 ,
are resting one on top of the other as shown in Fig.6.24. A horizontal force F is applied on block B. Assuming all the surfaces are frictionless ,
B ,
b and c`. ,
block B ,
calculate (1) acceleration of block A ,
each of mass 45kg ,
m 2 ,
respectively ,
Three blocks A ,
Three boys ,
Two blocks of masses m 1 and m 2 are placed side by side on a smooth horizontal surface as shown in Fig.6.31. A horizontal force F is applied on the block. a. Find the acceleration of each block. b. Find the normal reaction between the two blocks.
29
Aug
Two blocks of masses m 1 and m 2 are placed side by side on a smooth horizontal surface as shown in Fig.6.31. A horizontal force F is applied on the block. a. Find the acceleration of each block. b. Find the normal reaction between the two blocks. and between C and ground. and block [...]
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and between C and ground. ,
and block C; (2) normal reactions between A and B ,
and C of masses m 1 ,
and m 3 ,
are resting one on top of the other as shown in Fig.6.24. A horizontal force F is applied on block B. Assuming all the surfaces are frictionless ,
B ,
b and c`. ,
block B ,
calculate (1) acceleration of block A ,
each of mass 45kg ,
m 2 ,
respectively ,
Three blocks A ,
Three boys ,
A block of mass m is pulled along a horizontal surface by applying a force at an angle θ with the horizontal. If the block travels with a uniform velocity and has a displacement d and the coefficient of friction is μ, then the work done by the applied force is:
29
Aug
A block of mass m is pulled along a horizontal surface by applying a force at an angle θ with the horizontal. If the block travels with a uniform velocity and has a displacement d and the coefficient of friction is μ, then the work done by the applied force is: and between C and [...]
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and between C and ground. ,
and block C; (2) normal reactions between A and B ,
and C of masses m 1 ,
and m 3 ,
are resting one on top of the other as shown in Fig.6.24. A horizontal force F is applied on block B. Assuming all the surfaces are frictionless ,
B ,
b and c`. ,
block B ,
calculate (1) acceleration of block A ,
each of mass 45kg ,
m 2 ,
respectively ,
Three blocks A ,
Three boys ,
Three boys, each of mass 45kg, pull simultaneously a block on a smooth surface. The mass of block is 20.0kg. a. Find the acceleration of the block. b.Find the acceleration of the boy exerting force F 1 . Assume no friction between the boy and the surface. [Given F 1 =90N,F 2 =114N and F 3 =128root 2 N]
29
Aug
Three boys, each of mass 45kg, pull simultaneously a block on a smooth surface. The mass of block is 20.0kg. a. Find the acceleration of the block. b.Find the acceleration of the boy exerting force F 1 . Assume no friction between the boy and the surface. [Given F 1 =90N,F 2 =114N and [...]
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and between C and ground. ,
and block C; (2) normal reactions between A and B ,
and C of masses m 1 ,
and m 3 ,
are resting one on top of the other as shown in Fig.6.24. A horizontal force F is applied on block B. Assuming all the surfaces are frictionless ,
B ,
b and c`. ,
block B ,
calculate (1) acceleration of block A ,
each of mass 45kg ,
m 2 ,
respectively ,
Three blocks A ,
Three boys ,
Three blocks A, B,and C of masses m 1 ,m 2 , and m 3 ,respectively, are resting one on top of the other as shown in Fig.6.24. A horizontal force F is applied on block B. Assuming all the surfaces are frictionless, calculate (1) acceleration of block A, block B, and block C; (2) normal reactions between A and B, B and C, and between C and ground.
29
Aug
Three blocks A, B,and C of masses m 1 ,m 2 , and m 3 ,respectively, are resting one on top of the other as shown in Fig.6.24. A horizontal force F is applied on block B. Assuming all the surfaces are frictionless, calculate (1) acceleration of block A, block B, and block C; (2) [...]
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and between C and ground. ,
and block C; (2) normal reactions between A and B ,
and C of masses m 1 ,
and m 3 ,
are resting one on top of the other as shown in Fig.6.24. A horizontal force F is applied on block B. Assuming all the surfaces are frictionless ,
B ,
b and c`. ,
block B ,
calculate (1) acceleration of block A ,
m 2 ,
respectively ,
Three blocks A ,
Two cars A and B are moving west to east and south to north, respectively, along crossroads. A moves with a speed of 20 m s^-1 and is 500 m away from the point of intersection of cross roads and B moves with a speed of 15 ms^-1 and is 400 m away from the point of intersection of cross roads. Find the shortest distance between them.
28
Aug
Two cars A and B are moving west to east and south to north, respectively, along crossroads. A moves with a speed of 20 m s^-1 and is 500 m away from the point of intersection of cross roads and B moves with a speed of 15 ms^-1 and is 400 m away from the [...]
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respectively ,
Two cars A and B are moving west to east and south to north ,
Two particles A and B are moving with constant velocities v 1 and v 2 . At t = 0 ,
Two particles A and B are moving with constant velocities v_1 and v_2. At t = 0 ,
v 1 makes an angle θ 1 with the line joining A and B and v 2 makes an angle θ 2 with the line joining A and B. Find their velocity of approach. ,
Two similar spring P and Q have spring constants KP and KQ, such that KP KQ. They are stretched, first by the same amount (case a), then by the same force (case b). The work done by the spring WP and WQ are related as, in case (a) and case (b), respectively:
28
Aug
Two similar spring P and Q have spring constants KP and KQ, such that KP KQ. They are stretched, first by the same amount (case a), then by the same force (case b). The work done by the spring WP and WQ are related as, in case (a) and case (b), respectively: first by [...]
A block of mass 10 kg is in contact against the inner wall of a hollow cylindrical drum of radius 1 m. The coefficient of friction between the block and the inner wall of the cylinder is 0.1. The minimum angular velocity needed for the cylinder to keep the block stationary when the cylinder is vertical and rotating about its axis, will be : (g=10m/s^2)
28
Aug
A block of mass 10 kg is in contact against the inner wall of a hollow cylindrical drum of radius 1 m. The coefficient of friction between the block and the inner wall of the cylinder is 0.1. The minimum angular velocity needed for the cylinder to keep the block stationary when the cylinder is [...]
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Chapter 6 - Friction
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NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions
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Physics
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A plank with a box on it at one end is gradually raised about the other end. As the angle of inclination with the horizontal reaches 30 ,
respectively ,
the box starts to slip and slides 4.0 m down the plank in 4.0 s. The coefficients of static and kinetic friction between the box and the plank will be ,