Physics
A non-uniform bar of weight W is suspended at rest by two strings of negligible weight as shown in Fig. The angles made by the strings with the vertical are 36.9^∘ and 53.1^∘ respectively. The bar is 2m long. Calculate the distance d of the centre of gravity of the bar from its left end.
27
Nov
A non-uniform bar of weight W is suspended at rest by two strings of negligible weight as shown in Fig. The angles made by the strings with the vertical are 36.9^∘ and 53.1^∘ respectively. The bar is 2m long. Calculate the distance d of the centre of gravity of the bar from its left end. [...]
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Chapter 6 - System of Particles and Rotational Motion
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given that a chlorine atom is about 35.5 times as massive as a hydrogen atom and nearly all the mass of an atom is concentrated in its nucleus ? ,
In the HCI molecule ,
the separation between the nuclei of the two atoms is about 1.27Å (1Å=10^−10m). Find the approximate location of the c.m of the molecule ,
A child sits stationary at one end of a long trolley moving uniformly with a speed V on a smooth horizontal floor. If the child gets up and runs about on the trolley in any manner what is the speed of the centre of mass of the trolley + child system?
27
Nov
A child sits stationary at one end of a long trolley moving uniformly with a speed V on a smooth horizontal floor. If the child gets up and runs about on the trolley in any manner what is the speed of the centre of mass of the trolley + child system? given that a chlorine [...]
Posted in:
Chapter 6 - System of Particles and Rotational Motion
,
NCERT Exemplar Class 11
,
Physics
,
Tags:
given that a chlorine atom is about 35.5 times as massive as a hydrogen atom and nearly all the mass of an atom is concentrated in its nucleus ? ,
In the HCI molecule ,
the separation between the nuclei of the two atoms is about 1.27Å (1Å=10^−10m). Find the approximate location of the c.m of the molecule ,
In the HCI molecule, the separation between the nuclei of the two atoms is about 1.27Å (1Å=10^−10m). Find the approximate location of the c.m of the molecule, given that a chlorine atom is about 35.5 times as massive as a hydrogen atom and nearly all the mass of an atom is concentrated in its nucleus ?
27
Nov
In the HCI molecule, the separation between the nuclei of the two atoms is about 1.27Å (1Å=10^−10m). Find the approximate location of the c.m of the molecule, given that a chlorine atom is about 35.5 times as massive as a hydrogen atom and nearly all the mass of an atom is concentrated in its nucleus [...]
Posted in:
Chapter 6 - System of Particles and Rotational Motion
,
NCERT Exemplar Class 11
,
Physics
,
Tags:
given that a chlorine atom is about 35.5 times as massive as a hydrogen atom and nearly all the mass of an atom is concentrated in its nucleus ? ,
In the HCI molecule ,
the separation between the nuclei of the two atoms is about 1.27Å (1Å=10^−10m). Find the approximate location of the c.m of the molecule ,
A family uses 8kW of power. (a) Direct solar energy is incident on the horizontal surface at an average rate of 200 W per square metre. If 20% of this energy can be converted to useful electrical energy, how large an area is needed to supply 8kW? (b) Compare this area to that of the roof of a typical house.
27
Nov
A family uses 8kW of power. (a) Direct solar energy is incident on the horizontal surface at an average rate of 200 W per square metre. If 20% of this energy can be converted to useful electrical energy, how large an area is needed to supply 8kW? (b) Compare this area to that of the [...]
A 70kg man stands in contact against the inner wall of a hollow cylindrical drum of radius 3m rotating about its vertical axis. The coefficient of friction between the wall and his clothing is 0.15 . What is the minimum rotational speed of the cylinder to enable the man to remain stuck to the wall (without falling) when the floor is suddenly removed?
27
Nov
A 70kg man stands in contact against the inner wall of a hollow cylindrical drum of radius 3m rotating about its vertical axis. The coefficient of friction between the wall and his clothing is 0.15 . What is the minimum rotational speed of the cylinder to enable the man to remain stuck to the wall [...]
A disc revolves with a speed of 33 3/1 rev/min, and has a radius of 15 cm. Two coins are placed at 4 cm and 14 cm away from the centre of the record. If the coefficient of friction between the coins and the record is 0.15, which of the coins will revolve with the record?
27
Nov
A disc revolves with a speed of 33 3/1 rev/min, and has a radius of 15 cm. Two coins are placed at 4 cm and 14 cm away from the centre of the record. If the coefficient of friction between the coins and the record is 0.15, which of the coins will revolve with the [...]
The rear side of a truck is open and a box of 40 kg mass is placed 5 m from the open end The coefficient of friction between the box and the surface below it is 0.15 On a straight road the truck starts from rest and accelerates with 2m/s^2. At what distance from the starting point does the box fall off the truck ? Ignore the size of the box .
27
Nov
The rear side of a truck is open and a box of 40 kg mass is placed 5 m from the open end The coefficient of friction between the box and the surface below it is 0.15 On a straight road the truck starts from rest and accelerates with 2m/s^2. At what distance from the [...]
A block of mass 15kg is placed on a long trolley. The coefficient of static friction between the block and the trolley is 0.18. The trolley accelerates from rest with 0.5ms^−2 for 20s and then moves with uniform velocity. Discuss the motion of the block as viewed by, (a) a stationary observer on the ground. (b) an observer moving with the trolley.
27
Nov
A block of mass 15kg is placed on a long trolley. The coefficient of static friction between the block and the trolley is 0.18. The trolley accelerates from rest with 0.5ms^−2 for 20s and then moves with uniform velocity. Discuss the motion of the block as viewed by, (a) a stationary observer on the ground. [...]
Two bodies A and B of mass 5kg and 10kg, in contact with each other rest on a table against a rigid wall (see figure). The coefficient of friction between the bodies and the table is 0.15. A force of 200N is applied horizontally to A. What are (a) the reaction of the vertical wall. (b) the action-reaction forces between A and B? What happens when the wall is removed? Does the answer to (b) change, when the bodies are in motion? Ignore the difference between μs and μk.
27
Nov
Two bodies A and B of mass 5kg and 10kg, in contact with each other rest on a table against a rigid wall (see figure). The coefficient of friction between the bodies and the table is 0.15. A force of 200N is applied horizontally to A. What are (a) the reaction of the vertical wall. [...]
A monkey of mass 40 kg climbs on a rope which can stand a maximum tension of 600 N. In which of the following cases will the rope break. When the monkey
27
Nov
A monkey of mass 40 kg climbs on a rope which can stand a maximum tension of 600 N. In which of the following cases will the rope break. When the monkey A monkey of mass 40 kg climbs on a rope which can stand a maximum tension of 600 N. In which of the [...]