SaraNextGen Study App [2023-24]
Last Updated On [03-11-2023]

Statement 1:

A sphere is performing pure rolling on a rough horizontal with constant angular velocity. Frictional force acting on the sphere is zero

Statement 2:

Velocity of contact is zero

a)

Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1

b)

Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1

c)

Statement 1 is True, Statement 2 is False

d)

Statement 1 is False, Statement 2 is True


Question ID - 100861 :-

Statement 1:

A sphere is performing pure rolling on a rough horizontal with constant angular velocity. Frictional force acting on the sphere is zero

Statement 2:

Velocity of contact is zero

a)

Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1

b)

Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1

c)

Statement 1 is True, Statement 2 is False

d)

Statement 1 is False, Statement 2 is True

1 Answer
5876 Votes
3537

Answer Key : (b) -

(b)

If angular velocity is constant, then frictional force acting on the sphere is zero. In case of pure rolling, velocity of contact point is zero



Next Question :

Statement 1:

The total kinetic energy of a rolling solid sphere is the sum of translational and rotational kinetic energies

Statement 2:

For all solid bodies total kinetic energy is always twice the translational kinetic energy

a)

Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1

b)

Statement 1 is True, Statement 2 is True; Statement 2 is not correct explanation for Statement 1

c)

Statement 1 is True, Statement 2 is False

d)

Statement 1 is False, Statement 2 is True


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