NEET UG PHYSICS MCQ: SYSTEM OF PARTICLES

1 Hard

1 of 1

Analyzing +4 | -1

A uniform cubical box of side

a

is placed on a rough floor and it is to be moved by applying minimum possible force

F

at a point which is at a distance

b

above its centre of mass. If the coeflicient of friction is

\mu=0.4

, then what is the maximum possible value of

100 \times \frac{b}{a}

for which the box will not topple before moving?

View answer and explanation

Correct option: A

Option A is correct. The box will not topple if the torque due to the applied force is less than or equal to the torque due to the weight of the box. This condition leads to the maximum possible value of b/a being 0.5, hence 100 * (b/a) = 50.

More Questions from SYSTEM OF PARTICLES

Practice All Chapter MCQs →

Moment of inertia of a hollow cylinder of mass M and radius r about its own axis is Two particles of mass

{m_1}

and

{m_2}\,({m_1} > {m_2})

attract each other with a force inversely proportional to the square of the distance between them. If the particles are initially held at rest and then released, the centre of mass will The wheel of toy car rotates about axis. It slows down from 400 rps to 200 rps in 2s. Then its angular retardation in

\mathrm{rad}{\mathrm{s}^{ - 2}}

is When a ceiling fan is switched on, it makes 10 rotations in the first 4 s. How many rotations will it make in the next 4 s? (Assuming uniform angular acceleration) A particle of mass

m

is projected with a velocity '

u

' making an angle of

30^{\circ}

with the horizontal. The magnitude of angular momentum of the projectile about the point of projection when the particle is at its maximum height

h

is: The time period of the second’s hand of a watch is