What form of energy is contained in the following?
Differentiate between kinetic energy and the potential enrgy.
Prove that heat is the form of energy?
Can the kinetic energy of a body be negative?
State the conditions under which a force does no work.
A boy standing for the whole day feels tired. Has he done any work? Why does he feel tired?
Calculate work done against friction when 5 kg mass is dragged about 5 m distance.
Find the work done by a boy if he applies the force of 5N to displace a book through 20 cm.
Calculate the work against gravity when 3 kg stone is raised by 3m.
Atmosphere exerts enormous pressure to our body but we do not feel it, why?