Physics-
General
Easy
Question
A particle of mass m moves with a constant velocity. Which of the following statements is not correct about its angular momentum:
- it is zero when it is at A and moving along OA
- the same at all points along the line DE
- of the same magnitude but oppositely directed at B and D
- increases as it moves along the line BC
The correct answer is: increases as it moves along the line BC
Related Questions to study
physics-
In the figure (A) half of the meter scale is made of wood while the other half of steel. The wooden part is pivoted at O. A force F is applied at the end of steel part. In figure (B) the steel part is pivoted at O and the same force is applied at the wooden end:–
In the figure (A) half of the meter scale is made of wood while the other half of steel. The wooden part is pivoted at O. A force F is applied at the end of steel part. In figure (B) the steel part is pivoted at O and the same force is applied at the wooden end:–
physics-General
physics-
A person supports a book between finger and thumb as shown (the point of grip is assumed to be at the corner of the book). If the book has a weight of W then the person is producing a torque on the book of
A person supports a book between finger and thumb as shown (the point of grip is assumed to be at the corner of the book). If the book has a weight of W then the person is producing a torque on the book of
physics-General
physics-
A string is wrapped around the rim of a wheel of moment of inertia 0.20 kg- and radius 20 cm. The wheel is free to rotate about its axis and initially the wheel is rest. The string is now pulled by a force of 20N. The angular velocity of the string after 5 seconds will be:–
A string is wrapped around the rim of a wheel of moment of inertia 0.20 kg- and radius 20 cm. The wheel is free to rotate about its axis and initially the wheel is rest. The string is now pulled by a force of 20N. The angular velocity of the string after 5 seconds will be:–
physics-General
physics-
In figure, the winch is mounted on an axle, and the 6-sided nut is welded to the winch. By turning the nut with a wrench, a person can rotate the winch. For instance, turning the nut clockwise lifts the block off the ground, because more and more rope gets wrapped around the winch. Three students agree that using a longer wrench makes it easier to turn the winch. But they disagree about why. All three students are talking about the case where the winch is used, over a 10 s time interval, to lift the block one metre off the ground.
Student 1 By using a longer wrench, the person decreases the average force he must exert on the wrench, in order to lift the block one metre in 10s.
Student 2 : Using a longer wrench reduces the work done by the person as he uses the winch to lift the block 1m in 10s.
Student 3 : Using a longer wrench reduces the power that the person must exert to lift the block 1m in 10s.Which of the following is true about student 2 and 3 :-
In figure, the winch is mounted on an axle, and the 6-sided nut is welded to the winch. By turning the nut with a wrench, a person can rotate the winch. For instance, turning the nut clockwise lifts the block off the ground, because more and more rope gets wrapped around the winch. Three students agree that using a longer wrench makes it easier to turn the winch. But they disagree about why. All three students are talking about the case where the winch is used, over a 10 s time interval, to lift the block one metre off the ground.
Student 1 By using a longer wrench, the person decreases the average force he must exert on the wrench, in order to lift the block one metre in 10s.
Student 2 : Using a longer wrench reduces the work done by the person as he uses the winch to lift the block 1m in 10s.
Student 3 : Using a longer wrench reduces the power that the person must exert to lift the block 1m in 10s.Which of the following is true about student 2 and 3 :-
physics-General
physics-
A pendulum beating seconds is taken from the earth to a planet having both the mass and radius half as compared to the earth The time period of the pendulum will be
A pendulum beating seconds is taken from the earth to a planet having both the mass and radius half as compared to the earth The time period of the pendulum will be
physics-General
physics-
the dimensions of (force constant / mass) are the same as that
the dimensions of (force constant / mass) are the same as that
physics-General
maths-
Which of the following statement is true
Which of the following statement is true
maths-General
maths-
Find real part of
Find real part of
maths-General
maths-
If then x =
If then x =
maths-General
maths-
The value of is
The value of is
maths-General
chemistry-
The enthalpy of vapourisation of liquid water using the data :
The enthalpy of vapourisation of liquid water using the data :
chemistry-General
chemistry-
The conversion A to B is carried out by the following path :
Given e.u.,
e.u., e.u.
Where e.u. is entropy unit then is
The conversion A to B is carried out by the following path :
Given e.u.,
e.u., e.u.
Where e.u. is entropy unit then is
chemistry-General
chemistry-
A reversible process is taking place at constant temperature and pressure. Then at equilibrium
A reversible process is taking place at constant temperature and pressure. Then at equilibrium
chemistry-General
chemistry-
Consider the following processes :
For B+DE+2C, will be-
Consider the following processes :
For B+DE+2C, will be-
chemistry-General
chemistry-
From the following bond energies :
bond energy :
bond energy :
bond energy :
bond energy :
Enthalpy for the reaction,
will be:
From the following bond energies :
bond energy :
bond energy :
bond energy :
bond energy :
Enthalpy for the reaction,
will be:
chemistry-General