Qstnid -Iii-2-a Spinning Wheel A Is Brought In Contact With Another Wheel B, Initially At Rest. Because Of The Friction At Contact, The Second Wheel Also Starts Spinning. Which Of The Following Energies Of The Wheel B Increases? - 23: Heat And Temperature - Neet-xii-physics

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NEET-XII-Physics

23: Heat and Temperature

with Solutions - page 2

Qstn# iii-2 Prvs-Qstn Next-Qstn

#2
A spinning wheel A is brought in contact with another wheel B, initially at rest. Because of the friction at contact, the second wheel also starts spinning. Which of the following energies of the wheel B increases?
(a) Kinetic
(b) Total
(c) Mechanical
(d) Internal
digAnsr: a,b,c,d
Ans : (a) Kinetic
(b) Total
(c) Mechanical
(d) Internal
When the wheel B starts spinning because of the friction at contact, it will gain kinetic energy and, hence, mechanical energy (kinetic + potential energies). Also, internal energy will increase, which increases with rise in temperature. Along with it, the generation of heat energy due to friction will lead to increase in the net sum of all the energies, i.e. total energy.
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