Class Test 3, Fall-2016 Note; Formulae sheet and sclentific caliculator is allow
ID: 2035171 • Letter: C
Question
Class Test 3, Fall-2016 Note; Formulae sheet and sclentific caliculator is allowed during exam) State Work-Energy principle bj Relation between impulse and lnear momentum3 dl Law of conservation of energy Si units of impuise (3 St Units of rotational Kinetic eneny What is the diffierence between Conservative and non-conservative forces 2 bl Elastic and Inelastic collision (2) 3. A spherical body of moment of inertia 2.4 Kgmi rotating with angular velocity of 4 rad/s What is the rotational kinetic enerey of body? (2) A body of mass ws movingwith lcity. be the new ikinetic energy of body? Velocity doubied u wiemaes remains the same,what wExplanation / Answer
1)
(a) The principle of work and kinetic energy (also known as the work–energy principle) states that the work done by all forces acting on a particle (the work of the resultant force) equals the change in the kinetic energy of the particle.
(b) Impulse is equal to the change in momentum.
(c) The law of conservation of energy states energy cannot be created or destroyed, but may be changed from one form to another.
(d) SI unit of impulse is Ns (Newton-second).
(e) SI unit of rotational kinetic energy, just like any other form of energy, is J (joule.