# A cord is wrapped on a pulley (disk) of mass  and radius as shown in Figure. To one end of the cord, a block of mass  is connected as shown and to other end in (a) a force of 2  and in (b) a block of mass .Let angular acceleration of the disk in and is and , respectively, then (cord is not slipping on the pulley) a) b) c) d) None of these

## Question ID - 100197 :- A cord is wrapped on a pulley (disk) of mass  and radius as shown in Figure. To one end of the cord, a block of mass  is connected as shown and to other end in (a) a force of 2  and in (b) a block of mass .Let angular acceleration of the disk in and is and , respectively, then (cord is not slipping on the pulley) a) b) c) d) None of these

3537

(b)

In Fig,

From Figure,

So,

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Three balls  and  of masses 2 kg, 4 kg and 8 kg, respectively, move along the same straight line and in the same direction, with velocities 4 m/s, 1 m/s and 3/4 m/s. If collides with  and subsequently  collides with , find the velocity of ball and ball  after collision, taking the coefficient of restitution as unity

 a) b) c) d)