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A uniform circular disc of mass `M` and radius `R` rolls without slipping on a horizontal surface. If the velocity of its centre is `v_0`, then the total angular momentum of the disc about a fixed point `P` at a height `(3R)R` above the centre `C`.
27
Nov
A uniform circular disc of mass `M` and radius `R` rolls without slipping on a horizontal surface. If the velocity of its centre is `v_0`, then the total angular momentum of the disc about a fixed point `P` at a height `(3R)R` above the centre `C`. A uniform circular disc of mass `M` and radius [...]
A uniform thin rod of length l and mass m is hinged at a distance l/4 from one of the end and released from horizontal position as shown in Fig. The angular velocity of the rod as it passes the vertical position is
27
Nov
A uniform thin rod of length l and mass m is hinged at a distance l/4 from one of the end and released from horizontal position as shown in Fig. The angular velocity of the rod as it passes the vertical position is then the initial angular acceleration of the board is: (Neglect weight of [...]
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then the initial angular acceleration of the board is: (Neglect weight of board) ,
thereby destroying balance ,
Three children are sitting on a see-saw in such a way that it is balanced. A 20kg and a 30kg boy are on opposite sides at a distance of 2m from the pivot. If the third boy jumps off ,
A pebble of mass 0.05 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the pebble, (a) during its upward motion, (b) during its downward motion, (c) at the highest point where it is momentarily at rest. Do your answers change if the pebble was thrown at an angle of 45 degree with the horizontal direction? Ignore air resistance.
27
Nov
A pebble of mass 0.05 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the pebble, (a) during its upward motion, (b) during its downward motion, (c) at the highest point where it is momentarily at rest. Do your answers change if the pebble was thrown at an angle [...]
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(a) during its upward motion ,
(b) during its downward motion ,
(c) at the highest point where it is momentarily at rest. Do your answers change if the pebble was thrown at an angle of 45 degree with the horizontal direction? Ignore air resistance. ,
A pebble of mass 0.05 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the pebble ,
The ceiling of a long hall is 25 m high. What is the maximum horizontal distance that a ball thrown with a speed of 40ms^−1 can go without hitting the ceiling of the hall?
27
Nov
The ceiling of a long hall is 25 m high. What is the maximum horizontal distance that a ball thrown with a speed of 40ms^−1 can go without hitting the ceiling of the hall? The ceiling of a long hall is 25 m high. What is the maximum horizontal distance that a ball thrown with [...]
i and j are unit vectors along x- and y-axis respectively. What is the magnitude and direction of the vectors i + j and i− j ? What are the components of a vector A = 2i and 3j along the directions of i + j and i – j ? [You may use graphical method]
27
Nov
i and j are unit vectors along x- and y-axis respectively. What is the magnitude and direction of the vectors i + j and i− j ? What are the components of a vector A = 2i and 3j along the directions of i + j and i – j ? [You may use graphical [...]
An aircraft is flying at a height of 3400 m above the ground. If the angle subtended at a ground observation point by the aircraft positions 10 s apart is 30^o , what is the speed of the aircraft ?
27
Nov
An aircraft is flying at a height of 3400 m above the ground. If the angle subtended at a ground observation point by the aircraft positions 10 s apart is 30^o , what is the speed of the aircraft ? An aircraft is flying at a height of 3400 m above the ground. If the [...]
A fighter plane flying horizontally at an altitude of 1.5 km with speed 720 km/h passes directly overhead an anti-aircraft gun. At what angle from the vertical should the gun be fired for the shell with muzzle speed 600 ms^−1 to hit the plane ? At what minimum altitude should the pilot fly the plane to avoid being hit ? (Take g=10 ms^−2 )
27
Nov
A fighter plane flying horizontally at an altitude of 1.5 km with speed 720 km/h passes directly overhead an anti-aircraft gun. At what angle from the vertical should the gun be fired for the shell with muzzle speed 600 ms^−1 to hit the plane ? At what minimum altitude should the pilot fly the plane [...]
A cyclist is riding with a speed of 27 km/h. As he approaches a circular turn on the road of radius 80 m, he applies brakes and reduces his speed at the constant rate of 0.5 m/s every second. What is the magnitude and direction of the net acceleration of the cyclist on the circular turn ?
27
Nov
A cyclist is riding with a speed of 27 km/h. As he approaches a circular turn on the road of radius 80 m, he applies brakes and reduces his speed at the constant rate of 0.5 m/s every second. What is the magnitude and direction of the net acceleration of the cyclist on the circular [...]
What will be de – Broglie wavelength of an electron moving with a velocity of 1.2 x 10^5 m/s
27
Nov
What will be de – Broglie wavelength of an electron moving with a velocity of 1.2 x 10^5 m/s What will be de - Broglie wavelength of an electron moving with a velocity of 1.2 x 10^5 m/s November 27, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
The wave length associated with an electron moving with a velocity of 10^8 cm/s is
27
Nov
The wave length associated with an electron moving with a velocity of 10^8 cm/s is The wave length associated with an electron moving with a velocity of 10^8 cm/s is November 27, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,