The turning effect produced in a rigid body around a fixed point by the application of force is called 

. The condition for equilibrium is 

The earth revolving around the sun is in ……… equilibrium 

The centre of gravity of a cricket ball is at 

What is the relation between Nm and dyne cm? 

A steering wheel of diameter 1.5 m is rotated anti-clockwise by applying two forces each of magnitude 10  N. The moment of forces applied on it is ? 

. Which one of the following statements about the moment of a force or torque is correct? (a)  

In a uniform circular motion 

Which of the following quantities is constant for a body in uniform circular motion? 

. A force of 500 N produces a momentum of force of 400 Nm. What is the shortest distance between the point of application of force and turning point? (a) 

The centre of gravity of a cylindrical body is  

A body is acted upon by two unequal forces in opposite direction, but not in one line. The effect is that 

 In order to rotate a bar pivoted at its mid-point, we need to apply  

The moment of couple can be defined mathematically as the ___ 

Steering the wheel of a motor car is an example of  

The work done by a force on a body will be positive if the  

A ball of mass m is thrown vertically up with an initial velocity so as to reach a height h. Which of the following statements is correct about it?  

Work done by the force of gravity on a body moving upwards is  

1 horse power is equal to  

Earth has lot of energy stored in it. This energy is called  

The work done by a weight of 1 kg mass when it moves up through 1 m is 

A boy weighing 200 N climbs a vertical ladder. If the value of g be 10 m s–2, the work done by the boy in climbing 2 m height will be? 

Two bodies of masses m and 2m are raised to the heights of h and 2h respectively. What is the ratio of their gravitational potential energies?    

The momentum of a bullet of mass 20 g fired from a gun is 10 kg.m/s. The kinetic energy of this bullet in kJ will be ?

When the angle between the direction of force and the direction of displacement is an acute angle, the nature of work done is ___.

Energy transformation in a television is from 

The appliance which works on the principle of moment is 

A body falls freely under gravity from rest. What kind of energy it will possess on reaching the ground? 

 Energy transformation in a television is from 

The work done on an object does not depend on the 

A man has four options to move a body through a height. In which case is maximum work done? 

For an ideal machine, the ratio of mechanical advantage to the velocity ratio is 

A lever which always has mechanical advantage less than 1 has ____

 Which type of levers has mechanical advantage always more than 1? 

The correct relationship between the Mechanical advantage (MA), the velocity ratio (VR), and the efficiency (ŋ) is _____.

The change of direction of light when travelling from one medium to another transparent medium, is called ________________

Which of the following has the highest refractive index?

A ray of light directed towards the optical centre of a lens, after refraction it____ 

A thin lens has power of -10 dioptres. Which lens is it? 

When a white light ray falls on a prism, the ray at its first surface suffers