A constant torque acting on a uniform circular wheel changes its angular momentum from A 0 to 4 A 0 in 4 s. The magnitude of this torque is

Question

A constant torque acting on a uniform circular wheel changes its angular momentum from A 0 to 4 A 0 in 4 s. The magnitude of this torque is (A) (3 A0/4) (B)  A0 (C)  4A0 (D)  121A0

Tardigrade Admin · Accepted Answer

Change in angular momentum =4 A0-A0 Δ L=3 A0 Torque, τ=(Δ L/Δ t) τ=(3 A0/4)

Q. A constant torque acting on a uniform circular wheel changes its angular momentum from $A_{0}$ to $4 A_{0}$ in $4 s$ . The magnitude of this torque is

$\frac{3 A _{0}}{4}$

$A_{0}$

$4 A_{0}$

$121 A_{0}$

Change in angular momentum
$= 4 A_{0} - A_{0}$
$Δ L = 3 A_{0}$
Torque, $τ = \frac{Δ L}{Δ t}$
$τ = \frac{3 A _{0}}{4}$

Q. A constant torque acting on a uniform circular wheel changes its angular momentum from A0​ to 4A0​ in 4s. The magnitude of this torque is

43A0​​

A0​

4A0​

121A0​