Chapter 3 – Laws of Motion
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A block of mass is placed on a surface with a vertical cross section given by y=x^3/6. If the coefficient of friction is 0.5, the maximum height above the ground at which the block can be placed without slipping is:
27
Oct
A block of mass is placed on a surface with a vertical cross section given by y=x^3/6. If the coefficient of friction is 0.5, the maximum height above the ground at which the block can be placed without slipping is: A block of mass is placed on a surface with a vertical cross section given [...]
A point particle of mass m, moves long the uniformly rough track PQR as shown in figure. The coefficient of friction, between the particle and the rough track equals μ. The particle is released, from rest from the point P and it comes to rest at a point R. The energies, lost by the ball, over the parts, PQ and QR, of the track, are equal to each other, and no energy is lost when particle changes direction from PQ to QR. The value of the coefficient of friction μ and the distance x (=QR), are, respectively close to:
27
Oct
A point particle of mass m, moves long the uniformly rough track PQR as shown in figure. The coefficient of friction, between the particle and the rough track equals μ. The particle is released, from rest from the point P and it comes to rest at a point R. The energies, lost by the ball, [...]
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A point particle of mass m ,
and no energy is lost when particle changes direction from PQ to QR. The value of the coefficient of friction μ and the distance x (=QR) ,
are ,
are equal to each other ,
between the particle and the rough track equals μ. The particle is released ,
from rest from the point P and it comes to rest at a point R. The energies ,
lost by the ball ,
moves long the uniformly rough track PQR as shown in figure. The coefficient of friction ,
of the track ,
over the parts ,
PQ and QR ,
respectively close to: ,
A body of mass m=10−2kg is moving in a medium and experiences a frictional force F=−KV^2. Its initial speed is υ0=10ms^−2. If , after 10s, its energy is 1/8mυ^2 0, the value of k will be
27
Oct
A body of mass m=10−2kg is moving in a medium and experiences a frictional force F=−KV^2. Its initial speed is υ0=10ms^−2. If , after 10s, its energy is 1/8mυ^2 0, the value of k will be A body of mass m=10−2kg is moving in a medium and experiences a frictional force F=−KV^2. Its initial speed [...]
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 [...]