Physics Times 07.2019

(Kiana) #1
ANGULAR IMPULSE


  1. Two particles of equal mass m at A and B are
    connected by a rigid light rod AB lying on a smooth
    horizontal table. An impulse J is applied at A in the
    plane of the table and perpendicular to AB. The
    velocity of particle at A is:

  2. An impulse J is applied on a ring of mass m along a
    line passing through its centre O. The ring is placed
    on a rough horizontal surface. The linear velocity of
    centre of ring once it starts rolling without slipping
    is


(a) J/3m (b) J/m (c) J/4m (d) J/2m


  1. A uniform solid sphere of radius r is rolling on a
    smooth horizontal surface with velocity v and angular
    velocity
    4. A solid sphere of mass M and radius R is placed
    on a rough horizontal surface. It is struck by a
    horizontal cue stick at a height h above the
    surface. The value of h so that the sphere
    performs pure rolling motion immediately after
    it has been struck is


(a)

2 J
m (b) Zero (c)

J
m (d) 2

J
m

 v r . The sphere collides with the
wall as shown in the figure. The coefficient of friction
between the sphere and the edge



  1. Consider a body, shown in the figure, consisting
    of two identical balls, each of mass M connected
    by a light rigid rod. If an impulse J = Mv is
    imparted to the body at one of its ends, what
    would be its angular velocity?










4.

5.

1 / 5.Just after
the collision the angular velocity of the sphere
becomes zero. The linear velocity of the sphere just
after the collision is equal to

(a) 6

v
(b) 5

v
(c) v (d)

3
5

v

(a)

7
5

R
(b)

2
5

R
(c)

9
5

R
(d)

5
5

R

(a) V/L (b) 2V/L (c) V/3L (d) V/4L
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