Part 1
Two point masses of 0.3 kg and 0.7 kg are fixed at the ends of a rod of length 1.4 m and of negligible mass. The rod is set rotating about an axis perpendicular to its length with a uniform angular speed. The point on the rod through which the axis should pass in order that the work required for rotation of the rod is minimum, is located at a distance of
23
Oct
Two point masses of 0.3 kg and 0.7 kg are fixed at the ends of a rod of length 1.4 m and of negligible mass. The rod is set rotating about an axis perpendicular to its length with a uniform angular speed. The point on the rod through which the axis should pass in order [...]
A flywheel is in the form of a uniform circular disc of radius 1m and mass 2kg. The work which must be done on it to increase its frequency of rotation from 5 to 10 rev/s is approximately
23
Oct
A flywheel is in the form of a uniform circular disc of radius 1m and mass 2kg. The work which must be done on it to increase its frequency of rotation from 5 to 10 rev/s is approximately A flywheel is in the form of a uniform circular disc of radius 1m and mass 2kg. [...]
An automobile engine develops 100 kilo−watt, when rotating at a speed of 1800 rev/min. What torque does it deliver ?
23
Oct
An automobile engine develops 100 kilo−watt, when rotating at a speed of 1800 rev/min. What torque does it deliver ? An automobile engine develops 100 kilo−watt when rotating at a speed of 1800 rev/min. What torque does it deliver ? October 23, 2020 Category: Cengage NEET by C.P Singh , Chapter 11 - Rotational Motion [...]
A uniform rod is kept vertically on a horizontally smooth surface at a point O. IF it is rotated slightly and released, it falls down on the horizontal surface. The lower end will remain
23
Oct
A uniform rod is kept vertically on a horizontally smooth surface at a point O. IF it is rotated slightly and released, it falls down on the horizontal surface. The lower end will remain A uniform rod is kept vertically on a horizontally smooth surface at a point O. IF it is rotated slightly and [...]
A cord is wound round the circumference of wheel of radius r. The axis of the wheel is horizontal and fixed and moment of inertia about it is I. A weight mg is attached to the end of the cord and falls from rest. After falling through a distance h, the angular velocity of the wheel will be.
23
Oct
A cord is wound round the circumference of wheel of radius r. The axis of the wheel is horizontal and fixed and moment of inertia about it is I. A weight mg is attached to the end of the cord and falls from rest. After falling through a distance h, the angular velocity of the [...]
A uniform rod of length L is placed with one end in contact with the horizontal and is then inclined at an angle α to the horizontal and allowed to fall without slipping at contact point. When it becomes horizontal, its angular velocity will be
23
Oct
A uniform rod of length L is placed with one end in contact with the horizontal and is then inclined at an angle α to the horizontal and allowed to fall without slipping at contact point. When it becomes horizontal, its angular velocity will be If a ladder weighing 250 N is placed against a [...]
A block of base 10cm×10cm and height 15cm is kept on an inclined plane. The coefficient of friction between them is 3–√. The inclination θ of this inclined plane from the horizontal plane is gradually increased from 0∘. Then
23
Oct
A block of base 10cm×10cm and height 15cm is kept on an inclined plane. The coefficient of friction between them is 3–√. The inclination θ of this inclined plane from the horizontal plane is gradually increased from 0∘. Then If a ladder weighing 250 N is placed against a smooth vertical wall having coefficient of [...]
A rectangular block has a square base measuring a × a and its height is h. It moves on a horizontal surface in a direction perpendicular to one of the edges. The coefficient of friction is μ. It will topple if
23
Oct
A rectangular block has a square base measuring a × a and its height is h. It moves on a horizontal surface in a direction perpendicular to one of the edges. The coefficient of friction is μ. It will topple if If a ladder weighing 250 N is placed against a smooth vertical wall having [...]
A cyclist moves around a circular path of radius 40 3–√m with a speed of 20m/s. He must lean inwards at an angle θ with the vertical such that tanθ is equal to
23
Oct
A cyclist moves around a circular path of radius 40 3–√m with a speed of 20m/s. He must lean inwards at an angle θ with the vertical such that tanθ is equal to A cyclist moves around a circular path of radius 40 3–√m with a speed of 20m/s. He must lean inwards at an [...]
A ladder rests against a frictionless vertical wall, with its upper end 6m above the ground and the lower end 4m away from the wall. The weight of the ladder is 500N and its CG at 1/3rd distance from the lower end. Wall’s reaction will be (in newton)
23
Oct
A ladder rests against a frictionless vertical wall, with its upper end 6m above the ground and the lower end 4m away from the wall. The weight of the ladder is 500N and its CG at 1/3rd distance from the lower end. Wall’s reaction will be (in newton) A ladder rests against a frictionless vertical [...]