Please answer the following questions with detailed answers/solutions:Work done by a force on a body has to change the energy of that body. (True/false)Work is a measure of energy. (True/false)A horizontal force F acts on a simple pendulum to displace it through an angle θ. Calculate the work done by gravitational force (with proper sign).The work done by a centripetal force on a circulating body is necessarily zero. (True/false)A block of mass M attached to a spring of spring constant k is pushed down by a force F through a distance x. Find the work done by the spring force.A force F which acts at the topmost point of a disc makes it roll on the floor. For a displacement d,(A) The work done by friction is zero. (True/false)(B) The net work done on the disc is ________.When you jump into the air, the forces exerted by your leg muscles do work on your body. These forces are conservative. (True/false).If the potential energy of a diatomic molecule is given by U=A/r2 - B/r, where r is the separation between the two atoms and A & B are positive constants, the distance between the two atoms at equilibrium is ___.

Srikant Mahapatra , 14 Years ago

Grade 12