Physics-
General
Easy
Question
A wheel of radius 20 cm has force applied to it as shown in the figure. The torque produced by the forces 4N at A, 8N at B, 6N at C, 9N at D at angles indicated is :
- 5.40 N-m anticlockwise
- 1.80 N-m clockwise
- 2.0 N-m clockwise
- 5.4 N-m clockwise
The correct answer is: 5.4 N-m clockwise
Related Questions to study
Physics-
Assertion : A reference frame attached to earth is an inertial frame of reference.
Reason : The reference frame which has zero acceleation is called non inertial frame of reference.
Assertion : A reference frame attached to earth is an inertial frame of reference.
Reason : The reference frame which has zero acceleation is called non inertial frame of reference.
Physics-General
Physics-
Assertion : Mass is a measrure of inertia of the body in linear motion.
Reason : Greater the mass, greater is the force required to change its state of rest or of uniform motion.
Assertion : Mass is a measrure of inertia of the body in linear motion.
Reason : Greater the mass, greater is the force required to change its state of rest or of uniform motion.
Physics-General
Physics-
A body of mass m rests on horizontal surface. The coefficient of friction between the body and the surface is µ. If the mass is pulled by a force P as shown in the figure, the limiting friction between body and surface will be :
A body of mass m rests on horizontal surface. The coefficient of friction between the body and the surface is µ. If the mass is pulled by a force P as shown in the figure, the limiting friction between body and surface will be :
Physics-General
Physics-
A motorcycle is travelling on a curved track of radius 500 m. If the coefficient of friction between road and tyres is 0.5, the speed avoiding skidding will be :
A motorcycle is travelling on a curved track of radius 500 m. If the coefficient of friction between road and tyres is 0.5, the speed avoiding skidding will be :
Physics-General
Physics-
The coefficient of static friction, µs , between block A of mass 2 kg and the table as shown in the figure is 0.2. What would be the maximum mass value of block B so that the two blocks do not move? The string and the pulley are assumed to be smooth and massless. (g = 10 m/s2)
The coefficient of static friction, µs , between block A of mass 2 kg and the table as shown in the figure is 0.2. What would be the maximum mass value of block B so that the two blocks do not move? The string and the pulley are assumed to be smooth and massless. (g = 10 m/s2)
Physics-General
Physics-
The force–time (F – t) curve of a particle executing linear motion is as shown in the figure. The momentum acquired by the particle in time interval from zero to 8 second will be :
The force–time (F – t) curve of a particle executing linear motion is as shown in the figure. The momentum acquired by the particle in time interval from zero to 8 second will be :
Physics-General
Physics-
In the figure given below, the position–time graph of a particle of mass 0.1 kg is shown. The impulse at t = 2 sec is
In the figure given below, the position–time graph of a particle of mass 0.1 kg is shown. The impulse at t = 2 sec is
Physics-General
Physics-
A block B is placed on block A. The mass of block B is less than the mass of block A. Friction exists between the blocks, whereas the ground on which the block A is placed is taken to be smooth. A horizontal force F, increasing linearly with time begins to act on B. The acceleration aA and aB of blocks A and B respectively are plotted against t. The correctly plotted graph is:
A block B is placed on block A. The mass of block B is less than the mass of block A. Friction exists between the blocks, whereas the ground on which the block A is placed is taken to be smooth. A horizontal force F, increasing linearly with time begins to act on B. The acceleration aA and aB of blocks A and B respectively are plotted against t. The correctly plotted graph is:
Physics-General
Physics-
A false balance has equal arms. An object weigh X when placed in one pan and Y when placed in other pan, then the weight W of the object is equal to :
A false balance has equal arms. An object weigh X when placed in one pan and Y when placed in other pan, then the weight W of the object is equal to :
Physics-General
Physics-
Two masses of 5kg and 10 kg are connected to a pulley as shown. What will be the acceleration of the system (g = acceleration due to gravity) :
Two masses of 5kg and 10 kg are connected to a pulley as shown. What will be the acceleration of the system (g = acceleration due to gravity) :
Physics-General
Physics-
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 500 N and its C.G. at 1/3rd distance from the lower end. Wall's reaction will be, (in Newton) :
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 500 N and its C.G. at 1/3rd distance from the lower end. Wall's reaction will be, (in Newton) :
Physics-General
Physics-
The average force necessary to stop a bullet of mass 20 g moving with a speed of 250 m/s, as it penetrates into the wood for a distance of 12 cm is :
The average force necessary to stop a bullet of mass 20 g moving with a speed of 250 m/s, as it penetrates into the wood for a distance of 12 cm is :
Physics-General
Physics-
A man weighing 80 kg is standing in a trolley weighing 320 kg. The trolley is resting on frictionless horizontal rails. If the man starts walking on the trolley with a speed of 1 m/s, then after 4 sec his displacement relative to the ground will be :
A man weighing 80 kg is standing in a trolley weighing 320 kg. The trolley is resting on frictionless horizontal rails. If the man starts walking on the trolley with a speed of 1 m/s, then after 4 sec his displacement relative to the ground will be :
Physics-General
Physics-
A rough vertical board has an acceleration ‘a’ so that a 2 kg block pressing against it does not fall. The coefficient of friction between the block and the board should be :
A rough vertical board has an acceleration ‘a’ so that a 2 kg block pressing against it does not fall. The coefficient of friction between the block and the board should be :
Physics-General
Physics-
A body of weight 50 N placed on a horizontal surface is just moved by a force of 28.2 N. The frictional force and the normal reaction are :
A body of weight 50 N placed on a horizontal surface is just moved by a force of 28.2 N. The frictional force and the normal reaction are :
Physics-General
