Question Text
Question 7 :
What is the expression for kinetic energy and potential energy respectively?
Question 11 :
The velocity ratio of a combination of n moveable pulleys with a fixed pulley is always {tex}2^n{/tex}. Is it true or false?
Question 12 :
A body is acted upon by two unequal forces in opposite direction, but not in same line. The effect is that
Question 13 :
The lever for which the mechanical advantage is less than 1 has the
Question 17 :
If kinetic energy of a body is 20 J, mass of the body is 10 kg. Then find the momentum of the body?
Question 19 :
Work done by the force of gravity is same whether the body comes down from a certain height using stairs or slope or a lift. Is the statement true or false?
Question 21 :
The SI unit of power is watt. It is expressed in terms of mass, length and time as:
Question 23 :
The point of action of force on a rigid body is :
Question 24 :
A single fixed pulley and a movable pulley both are separately used to lift a load of 50 kgf to the same height. Compare the efforts applied.
Question 25 :
A lever which always have mechanical advantage more than 1 is :