Question

ou are sparring in a tae kwon do class. Your opponent executes a roundhouse kick. The average angular velocity of his kicking leg and foot is 20 rad/s. The angular displacement from his foot to your head is 5 rad. How much time do you have to move if you want to avoid being kicked in the head?

Answer 1

0.25 s

Step-by-step explanation:

The angular velocity, ω, is related to the angular displacement, θ, by

`\omega = (\theta)/(t)`

t is the time.

Making t subject of the formula,

`t = (\theta)/(\omega)`

Substituting values in the question,

`t = (5)/(20) = 0.25\text{ s}`