Question

a torque of 20 nm is applied on a wheel initially at rest,calculate the angular momentum of wheel after three second​

Answer 1

Answer:

60 n-s. hahahah haha ah

Answer 2

Given :

Applied torque = 20 N m

Time interval = 2 s

To Find :

The change in angular momentum of wheel.

Solution :

❖ As per Newton's second law of motion for rotation, Torque is defined as the rate of change of angular momentum of rotating object.

» Torque is an axial vector quantity

» SI unit : N m

» CGS unit : dyne cm

Mathematically, τ = dL/dt

τ denotes torque

dL denotes change in angular momentum

dt denotes time interval

By substituting the given values;

➙ τ = dL / dt

➙ 20 = dL/2

➙ dL = 20 × 2

➙ dL = 40 N m/s

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