Physics
A block of mass 25 kg is raised by a 50kg man in two different ways as shown in fig. what is the action on the floor by the man in the two cases? If the floor yields to a normal force of 700N, which mode should the man adopt to lift the block without the floor yielding?
27
Nov
A block of mass 25 kg is raised by a 50kg man in two different ways as shown in fig. what is the action on the floor by the man in the two cases? If the floor yields to a normal force of 700N, which mode should the man adopt to lift the block without [...]
An aircraft executes a horizontal loop at a speed of 720 km/h with its wings banked at 15^0 . What is the radius of the loop?
27
Nov
An aircraft executes a horizontal loop at a speed of 720 km/h with its wings banked at 15^0 . What is the radius of the loop? An aircraft executes a horizontal loop at a speed of 720 km/h with its wings banked at 15^0 . What is the radius of the loop? November 27, 2020 [...]
Ten one-rupee coins are put on top of each other on a table. Each coin has a mass m. Give the magnitude and direction of
27
Nov
Ten one-rupee coins are put on top of each other on a table. Each coin has a mass m. Give the magnitude and direction of Ten one-rupee coins are put on top of each other on a table. Each coin has a mass m. Give the magnitude and direction of November 27, 2020 Category: Chapter [...]
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 [...]
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 [...]
A shell of mass 0.020kg is fired by a gun of mass 100kg. If the muzzle speed of the shell is 80m/s. what is the recoil speed of the gun?
27
Nov
A shell of mass 0.020kg is fired by a gun of mass 100kg. If the muzzle speed of the shell is 80m/s. what is the recoil speed of the gun? A shell of mass 0.020kg is fired by a gun of mass 100kg. If the muzzle speed of the shell is 80m/s. what is the [...]