Question

Your pet hamster sits on a record player whose angular speed is constant. If he moves to a point twice as far from the center, then his linear speed
A) doubles.
B) halves.
C) remains the same.

Answer 1

Answer:

option A

Explanation:

given,                    

angular speed is constant

initial distance = r                

final distance (r')= 2 r

initial linear velocity = v

final linear velocity = v'

we know,                  

v = r ω......................(1)

where r is the distance

ω is the angular speed

now,            

v' = r' ω            

v' = 2 r ω        

v' = 2 v                

hence, the linear velocity doubles.

The correct answer is option A