## Question

An object of mass 0.40kg attached to the end of a string is whirled round in a horizontal circle of radius 2.0m with a constant speed of 8 m/s. Calculate the angular velocity of the object.

## Solution

**The final answer to the above question is 4 radians per second** **(rad/s)**

### Explanation

**Data:**

Radius, r = 2.0 m

Linear speed, v = 8 m/s

mass, m = 0.40kg

**Unknown**

Angular velocity, ω = ?

**Formula **

ω = v / r

### Solution

We will now plugin our data into the above formula

ω = v / r = 8 / 2 = 4 rad/s

**Therefore, the final answer to the angular velocity of the object is 4 radians per second (rad/s) **

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