JEE Mains Physics 2002-2019 Solved Video Solutions
A particle is moving in a circular path of radius a under the action of an attractive potential U=−k2/r^2. Its total energy is :
27
Oct
A particle is moving in a circular path of radius a under the action of an attractive potential U=−k2/r^2. Its total energy is : A particle is moving in a circular path of radius a under the action of an attractive potential U=−k2/r^2. Its total energy is : October 27, 2020 Category: Chapter 3 - [...]
Two masses m1 =5 kg and m2 =10 kg, connected by an inextensible string over a frictionless pulley, are moving as shown in the figure. The coefficient of friction of horizontal surface is 0.15. The minimum weight m that should be put on top of m2 to stop the motion is:
27
Oct
Two masses m1 =5 kg and m2 =10 kg, connected by an inextensible string over a frictionless pulley, are moving as shown in the figure. The coefficient of friction of horizontal surface is 0.15. The minimum weight m that should be put on top of m2 to stop the motion is: are moving as shown [...]
A block kept on a rough inclined plane ,as shown in the figure, remains at rest upto a maximum force 2 N down the inclined plane. The maximum external force up the inclined plane that does not move the block is 10 N. The coefficient of static friction between the block and the plane is : [Taking g=10 m/s^2].
27
Oct
A block kept on a rough inclined plane ,as shown in the figure, remains at rest upto a maximum force 2 N down the inclined plane. The maximum external force up the inclined plane that does not move the block is 10 N. The coefficient of static friction between the block and the plane is [...]
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A block kept on a rough inclined plane ,
A mass of 10 kg is suspended vertically by a rope from the roof. When a horizontal force is applied on the rope at some point ,
As shown in the figure ,
the magnitude of the force applied is (g=10ms^−2) ,
the rope deviated at an angle of 45^∘ at the roof point. If the suspended mass is at equilibrium ,
A particle of mass is moving in a straight line with momentum p. Starting at time t= 0, a force F= kt acts in the same direction on the moving particle during time interval T so that its momentum changes from p to 3p. Here k is constant . The value of T is :
27
Oct
A particle of mass is moving in a straight line with momentum p. Starting at time t= 0, a force F= kt acts in the same direction on the moving particle during time interval T so that its momentum changes from p to 3p. Here k is constant . The value of T is : [...]
Two forces P and Q of magnitude 2F and 3F, respectively, are at an angle θ with each other. If the force Q is doubled, then their resultant also gets doubled. Then, the angle θ is
27
Oct
Two forces P and Q of magnitude 2F and 3F, respectively, are at an angle θ with each other. If the force Q is doubled, then their resultant also gets doubled. Then, the angle θ is are at an angle θ with each other. If the force Q is doubled respectively the angle θ is [...]
To mop-clean a floor, a cleaning machine presses a circular mop of radius R vertically down with a total force F and rotates it with a constant angular speed about its axis. If the force F is distributed uniformly over the mop and the floor is μ, the torque, applied by the machine on the mop is (N-m) is
27
Oct
To mop-clean a floor, a cleaning machine presses a circular mop of radius R vertically down with a total force F and rotates it with a constant angular speed about its axis. If the force F is distributed uniformly over the mop and the floor is μ, the torque, applied by the machine on the [...]
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A mass of 10 kg is suspended vertically by a rope from the roof. When a horizontal force is applied on the rope at some point ,
the magnitude of the force applied is (g=10ms^−2) ,
the rope deviated at an angle of 45^∘ at the roof point. If the suspended mass is at equilibrium ,
To mop-clean a floor ,
A mass of 10 kg is suspended vertically by a rope from the roof. When a horizontal force is applied on the rope at some point, the rope deviated at an angle of 45^∘ at the roof point. If the suspended mass is at equilibrium, the magnitude of the force applied is (g=10ms^−2)
23
Oct
A mass of 10 kg is suspended vertically by a rope from the roof. When a horizontal force is applied on the rope at some point, the rope deviated at an angle of 45^∘ at the roof point. If the suspended mass is at equilibrium, the magnitude of the force applied is (g=10ms^−2) A mass [...]
A block of mass 10 kg is kept on a rough inclined plane as shown in the figure. A force of 3 N is applied on the block. The coefficient of static friction between the plane and the block is 0.6 What should be the minimum value of force P, such that the block does not move downward? (take g=10ms^−2)
23
Oct
A block of mass 10 kg is kept on a rough inclined plane as shown in the figure. A force of 3 N is applied on the block. The coefficient of static friction between the plane and the block is 0.6 What should be the minimum value of force P, such that the block does [...]
A block of mass 5 kg is (i) pushed in case (A) and (ii) pulled in case (B), by a force F = 20 N, making an angle of 30^∘ with the horizontal, as shown in the figures. The coefficient of friction between the block and floor is μ=0.2 . The difference between the accelerations of the block, in case (B) and case (A) will be: (g=10ms^−2)
23
Oct
A block of mass 5 kg is (i) pushed in case (A) and (ii) pulled in case (B), by a force F = 20 N, making an angle of 30^∘ with the horizontal, as shown in the figures. The coefficient of friction between the block and floor is μ=0.2 . The difference between the accelerations [...]
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A block of mass 5 kg is (i) pushed in case (A) and (ii) pulled in case (B) ,
as shown in the figures. The coefficient of friction between the block and floor is μ=0.2 . The difference between the accelerations of the block ,
by a force F = 20 N ,
in case (B) and case (A) will be: (g=10ms^−2) ,
making an angle of 30^∘ with the horizontal ,
Two blocks A and B of masses mA=1kg and mB=3kg are kept on the table as shown in figure. The coefficient of friction between A and B is 0.2 and between B and the surface of the table is also 0.2. The maximum force F that can be applied on B horizontally, so that the block A does not slide over the block B is [Take g=10m/s^2]
23
Oct
Two blocks A and B of masses mA=1kg and mB=3kg are kept on the table as shown in figure. The coefficient of friction between A and B is 0.2 and between B and the surface of the table is also 0.2. The maximum force F that can be applied on B horizontally, so that the [...]