Chapter 9 – Circular Motion
A mass is supported on a frictionless horizontal surface. It Is attached to a string and rotates about a fixed center at an angular velocity ω0.If the length of the string and angular velocity both are doubled, the tension in the string which was initially T0 is now
21
Oct
A mass is supported on a frictionless horizontal surface. It Is attached to a string and rotates about a fixed center at an angular velocity ω0.If the length of the string and angular velocity both are doubled, the tension in the string which was initially T0 is now if w= i - j + k [...]
A ball of mass 500 g tied to one end of string is revolved in a horizontal circle of radius 10cm with a speed 1/πrev/s in gravity-free space, then the linear velocity, acceleration and tension in the string will be
21
Oct
A ball of mass 500 g tied to one end of string is revolved in a horizontal circle of radius 10cm with a speed 1/πrev/s in gravity-free space, then the linear velocity, acceleration and tension in the string will be A ball of mass 500 g tied to one end of string is revolved in [...]
A hollow cylinder of radius R rotates about its axis which is vertical. A block remains in contact with the inner wall if the frequency of rotation is f hertz, but falls at lower frequencies. The coefficient of friction between the block and the cylinder is
21
Oct
A hollow cylinder of radius R rotates about its axis which is vertical. A block remains in contact with the inner wall if the frequency of rotation is f hertz, but falls at lower frequencies. The coefficient of friction between the block and the cylinder is A hollow cylinder of radius R rotates about its [...]
A particle of mass m is fixed to one end of a massless spring of spring constant k and natural length l0. The system is rotated about the other end of the spring with an angular velocity ω in gravity-free space. The final length of spring is
21
Oct
A particle of mass m is fixed to one end of a massless spring of spring constant k and natural length l0. The system is rotated about the other end of the spring with an angular velocity ω in gravity-free space. The final length of spring is if w= i - j + k and [...]
A particle of mass m is tied to a light string of length L and moving in a horizontal circle of radius r with speed v as shown. The forces acting on the particle are
21
Oct
A particle of mass m is tied to a light string of length L and moving in a horizontal circle of radius r with speed v as shown. The forces acting on the particle are A particle of mass m is tied to a light string of length L and moving in a horizontal circle [...]
Keeping the angle of banking, if the radius of curvature is made four times, the percentage increase in the maximum speed with which a vehicle can travel on a circular road is
21
Oct
Keeping the angle of banking, if the radius of curvature is made four times, the percentage increase in the maximum speed with which a vehicle can travel on a circular road is if the radius of curvature is made four times Keeping the angle of banking the percentage increase in the maximum speed with which [...]
A car of mass 1000kg negotiates a banked curve of radius 90m on a frictionless road. If the banking angle is 45^∘ the speed of the car is:
21
Oct
A car of mass 1000kg negotiates a banked curve of radius 90m on a frictionless road. If the banking angle is 45^∘ the speed of the car is: A car of mass 1000kg negotiates a banked curve of radius 90m on a frictionless road. If the banking angle is 45^∘ the speed of the car [...]
A coin, placed on a rotating turntable slips, when it is placed at a distance of 9 cm from the center. If the angular velocity of the turntable is tripled, it will just slip, If its distance from the center is
21
Oct
A coin, placed on a rotating turntable slips, when it is placed at a distance of 9 cm from the center. If the angular velocity of the turntable is tripled, it will just slip, If its distance from the center is A coin If its distance from the center is it will just slip placed [...]
A car is taking turn on a circular path of radius R. If the coefficient of friction between the tyres and road is μ, the maximum velocity for no slipping is
21
Oct
A car is taking turn on a circular path of radius R. If the coefficient of friction between the tyres and road is μ, the maximum velocity for no slipping is A car is taking turn on a circular path of radius R. If the coefficient of friction between the tyres and road is μ [...]
A particle is kept fixed on a turntable rotating uniformly. As seen from the ground the particle goes in a circle, its speed is 20cm/s & acceleration is 20cm/s^2. The particle is now shifted to a new position to make the radius half of the original value. The new values of the speed & acceleration will be:
21
Oct
A particle is kept fixed on a turntable rotating uniformly. As seen from the ground the particle goes in a circle, its speed is 20cm/s & acceleration is 20cm/s^2. The particle is now shifted to a new position to make the radius half of the original value. The new values of the speed & acceleration [...]
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A particle is kept fixed on a turntable rotating uniformly. As seen from the ground the particle goes in a circle ,
its speed is 20cm/s & acceleration is 20cm/s^2. The particle is now shifted to a new position to make the radius half of the original value. The new values of the speed & acceleration will be: ,