In the given curved road, if particle is released from 
then
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a)
Kinetic energy at 
must be 
b)
Kinetic energy at 
may be zero
c)
Kinetic energy at 
must be less than 
d)
Kinetic energy at 
must not be equal to zero
thena)
Kinetic energy at must be
b)
Kinetic energy at may be zero
c)
Kinetic energy at must be less than
d)
Kinetic energy at must not be equal to zero
Question ID - 50852 | SaraNextGen Top Answer In the given curved road, if particle is released from then
a)
Kinetic energy at must be
b)
Kinetic energy at may be zero
c)
Kinetic energy at must be less than
d)
Kinetic energy at must not be equal to zero
In the given curved road, if particle is released from then
|
a) |
Kinetic energy at |
b) |
Kinetic energy at |
|
c) |
Kinetic energy at |
d) |
Kinetic energy at |
(b)
1. If the surface is smooth then the kinetic energy at 
never be zero
2. If the surface is rough, the kinetic energy at 
be zero. Because, work done by force of friction is negative. If work done by friction is equal to 
then, net work done on body will be zero. Hence, net change in kinetic energy is zero. Hence, (b) is correct
3. If the surface is rough, the kinetic energy at 
must be lesser than 
. If surface is smooth, the kinetic energy at 
is equal to 
4.The reason is same as in (a) and (b)