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A disc of mass m and radius R has a concentric hole of radius r. Its moment of inertia about an axis through its center and perpendicular to its plane is
27
Nov
A disc of mass m and radius R has a concentric hole of radius r. Its moment of inertia about an axis through its center and perpendicular to its plane is A disc of mass m and radius R has a concentric hole of radius r. Its moment of inertia about an axis through its [...]
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=t3+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 .
27
Nov
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=t3+5 , where s is in metres and t is [...]
A helicopter of mass 1000 kg rises with a vertical acceleration of 15ms^−2 The crew and the passengers weight 300 kg Give the magnitude and direction of (a) force on the floor by the the crew and passengers (b) action of the rotor of the helicopter on surrounding air (c) force on the helicopter due to surrounding air
27
Nov
A helicopter of mass 1000 kg rises with a vertical acceleration of 15ms^−2 The crew and the passengers weight 300 kg Give the magnitude and direction of (a) force on the floor by the the crew and passengers (b) action of the rotor of the helicopter on surrounding air (c) force on the helicopter due [...]
Figure shows a man standing stationary with respect to a horizontal conveyor belt that is accelerating with 1ms^−2 . What is the net force on the man? If the coefficient of static friction between the man’s shoes and the belt is 0.2, up to what acceleration of the belt can the man continue to be stationary relative to the belt? (Mass of the man =65kg)
27
Nov
Figure shows a man standing stationary with respect to a horizontal conveyor belt that is accelerating with 1ms^−2 . What is the net force on the man? If the coefficient of static friction between the man’s shoes and the belt is 0.2, up to what acceleration of the belt can the man continue to be [...]
The figure shows the position-time graph of a body of mass 0.04 kg. Suggest a suitable physical context for this motion. What is the time between two consecutive impulses received by the body? What is the magnitude of each impulse?
27
Nov
The figure shows the position-time graph of a body of mass 0.04 kg. Suggest a suitable physical context for this motion. What is the time between two consecutive impulses received by the body? What is the magnitude of each impulse? A shell of mass 0.020kg is fired by a gun of mass 100kg. If the [...]
A stone of mass 0.25kg tied to the end of a string is whirled round in a circle of radius 1.5m with speed 40rev/min in a horizontal plane. What is the tension in the string and what is the maximum speed with which the stone can be whirled around, if the string can withstand a maximum tension of 200N?
27
Nov
A stone of mass 0.25kg tied to the end of a string is whirled round in a circle of radius 1.5m with speed 40rev/min in a horizontal plane. What is the tension in the string and what is the maximum speed with which the stone can be whirled around, if the string can withstand a [...]
A stream of water flowing horizontally with a speed of 15ms^−1 pushes out of a tube of cross sectional area 10^−2m^2 and hits a vertical wall near by what is the force exerted on the wall by the impact of water assuming that it does not rebound?
27
Nov
A stream of water flowing horizontally with a speed of 15ms^−1 pushes out of a tube of cross sectional area 10^−2m^2 and hits a vertical wall near by what is the force exerted on the wall by the impact of water assuming that it does not rebound? A shell of mass 0.020kg is fired by [...]
he moment of inertia of a thin square plate ABCD, of uniform thickness about an axis passing through the centre O and perpendicular to the plane of the plate is where I1,I2,I3 and I4 are respectively moments of inertia about axes 1, 2, 3 and 4 which are in the plane of the plate
27
Nov
he moment of inertia of a thin square plate ABCD, of uniform thickness about an axis passing through the centre O and perpendicular to the plane of the plate is where I1,I2,I3 and I4 are respectively moments of inertia about axes 1, 2, 3 and 4 which are in the plane of the plate 2 [...]
Let I be the moment of inertia, of a uniform square plate about an axis AB that passes through its center and is parallel to two of its sides. CD is a line in the plane of the plate that passes through the center of the plate and makes an angle θ with AB as shown in the figure. The moment of inertia of the plate about the axis CD is then equal to
27
Nov
Let I be the moment of inertia, of a uniform square plate about an axis AB that passes through its center and is parallel to two of its sides. CD is a line in the plane of the plate that passes through the center of the plate and makes an angle θ with AB as [...]
A batsman deflects a ball by an angle of 45^o without changing its initial speed which is equal to 54km/h. what is the impulse imparted to the ball? (mass of the ball is 0.15kg)
27
Nov
A batsman deflects a ball by an angle of 45^o without changing its initial speed which is equal to 54km/h. what is the impulse imparted to the ball? (mass of the ball is 0.15kg) A batsman deflects a ball by an angle of 45^o without changing its initial speed which is equal to 54km/h. what [...]