Chapter 2 – Kinematics
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A uniform rod of length ℓ is being rotated in a horizontal plane with a constant angular speed about an axis passing through one of its ends. If the tension generated in the rod due to rotation is T(x) at a distance x from the axis, then which of the following graphs depicts it most closely?
29
Nov
A uniform rod of length ℓ is being rotated in a horizontal plane with a constant angular speed about an axis passing through one of its ends. If the tension generated in the rod due to rotation is T(x) at a distance x from the axis, then which of the following graphs depicts it most [...]
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Chapter 2 - Kinematics
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Chapter 5 - Rotational Motion
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JEE Mains Physics 2002-2019 Solved Video Solutions
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A ball rests upon a flat piece of paper on a table top. The paper is pulled horizontally but quickly towards right as shown. Relative to its initial position with respect to the table ,
i.e. in the direction in which the paper is pulled. Here ,
i.e. to the left if there is a friction between the paper and the ball. c) moves forward ,
the ball a) remains stationary if there is no friction between the paper and the ball. b) moves to the left and starts rolling backwards ,
the correct statement/s is /are.......... ,
A bob of mass m attached to an inextensible string of length I is suspended from a vertical support. The bob rotates in a horizontal circle with an angular speed ω red/s about the vertical support . About the point of suspension:
29
Nov
A bob of mass m attached to an inextensible string of length I is suspended from a vertical support. The bob rotates in a horizontal circle with an angular speed ω red/s about the vertical support . About the point of suspension: A ball rests upon a flat piece of paper on a table top. [...]
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A ball rests upon a flat piece of paper on a table top. The paper is pulled horizontally but quickly towards right as shown. Relative to its initial position with respect to the table ,
i.e. in the direction in which the paper is pulled. Here ,
i.e. to the left if there is a friction between the paper and the ball. c) moves forward ,
the ball a) remains stationary if there is no friction between the paper and the ball. b) moves to the left and starts rolling backwards ,
the correct statement/s is /are.......... ,
A boy playing on the roof of a 10m high building throws a ball with a speed of 10m/s at an angle of 30(∘) with the horizontal. How far from the throwing point will the ball be at the height of 10m from the ground ? [g=10m/s^2,sin30∘=1/2,cos30∘=3–√2]
23
Oct
A boy playing on the roof of a 10m high building throws a ball with a speed of 10m/s at an angle of 30(∘) with the horizontal. How far from the throwing point will the ball be at the height of 10m from the ground ? [g=10m/s^2,sin30∘=1/2,cos30∘=3–√2] A small particle of mass m is projected [...]
A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion of the particle takes place in a plane. It follows that
23
Oct
A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion of the particle takes place in a plane. It follows that A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. [...]
A body is at rest at x=0 . At t=0, it starts moving in the positive x−direction with a constant acceleration . At the same instant another body passes through x=0 moving in the positive x−direction with a constant speed . The position of the first body is given by x1(t) after time ‘t’, and that of the second body by x2(t) after the same time interval . which of the following graphs correctly describes (x1−x2) as a function of time ‘t’ ?
23
Oct
A body is at rest at x=0 . At t=0, it starts moving in the positive x−direction with a constant acceleration . At the same instant another body passes through x=0 moving in the positive x−direction with a constant speed . The position of the first body is given by x1(t) after time ‘t’, and [...]
A point p moves in counter – clockwise direction on a circular path as shown in the figure . The movement of ‘p’ is such that it sweeps out in the figure . The movement of ‘p’ is such that it sweeps out a length s=t^3+5 , where s is in metres and t is in seconds . The radius of the path is 20m . The acceleration of ‘P’ when t=2s is nearly .
23
Oct
A point p moves in counter – clockwise direction on a circular path as shown in the figure . The movement of ‘p’ is such that it sweeps out in the figure . The movement of ‘p’ is such that it sweeps out a length s=t^3+5 , where s is in metres and t is [...]
A small particle of mass m is projected at an angle θ with x-axis with initial velocity υ0 in x-y plane as shown in Fig. At a same time t
23
Oct
A small particle of mass m is projected at an angle θ with x-axis with initial velocity υ0 in x-y plane as shown in Fig. At a same time t A small particle of mass m is projected at an angle θ with x-axis with initial velocity υ0 in x-y plane as shown in Fig. [...]
For a particle in uniform circular motion , the acceleration a at a point p(R,θ) on the circle of radius R is ( Here θ is measured from the x−axis )
23
Oct
For a particle in uniform circular motion , the acceleration a at a point p(R,θ) on the circle of radius R is ( Here θ is measured from the x−axis ) For a particle in uniform circular motion the acceleration a at a point p(R θ) on the circle of radius R is ( Here [...]
A mas m hangs with help of a string wrapped around a pulley on a frictionless bearing. The pulley has mass m and radius R. Assuming pulley to be a perfect uniform circular disc, the acceleration of the mass m, if the string does not slip on the pulley, is:
23
Oct
A mas m hangs with help of a string wrapped around a pulley on a frictionless bearing. The pulley has mass m and radius R. Assuming pulley to be a perfect uniform circular disc, the acceleration of the mass m, if the string does not slip on the pulley, is: A mas m hangs with [...]
A particle of mass ‘m’ is projected with a velocity υ making an angle of 30^∘ with the horizontal. The magnitude of angular moment of the projectile about the point of projection when the particle is at its maximum height ‘h’ is
23
Oct
A particle of mass ‘m’ is projected with a velocity υ making an angle of 30^∘ with the horizontal. The magnitude of angular moment of the projectile about the point of projection when the particle is at its maximum height ‘h’ is In the cube of side 'a' shown in the figure the vector from [...]