Physics - Heat & Thermo Question with Solution | TestHub
A particle of mass 1 kg slides in a horizontal circle of radius 20 m with a constant speed of 1 m/s. The only forces in the vertical direction acting on the particle are its weight and the normal reaction, however no information is available about the forces in the horizontal plane. Over a period of time the whole energy dissipated due to work done by friction is conducted to ground and simultaneously radiated to surround. If the coefficient of friction is (take m/s²):
Options:(select one or more)
Answer:
Solution:
The particle slides, so friction is kinetic. N, so N (A). Kinetic friction opposes the velocity, so it acts along the tangent (B). It is not towards the centre (C false), and the data are enough (D false). Other horizontal forces keep the speed constant and provide the centripetal force.
