Question

Two hover pucks collide in an off-centered collision and stick to one another via velcro. When they do so, they rotate in place. Consider what was just stated, but suppose we replace both hover pucks with pucks that are the same size as the originals but twice as massive. Otherwise, we keep the experiment the same. Compared to the pucks first mentioned, this pair of pucks will rotate:_______.
A) twice as fast.
B) one-half as fast.
C) at the same rate.
D) one-fourth as fast.
E) four times as fast.
Explain reasoning.

Answer 1

Answer:

They will rotate twice as fast

Explanation:

Angular momentum is product of

m=  mass,

v=velocity

and

r= radius.

i-e

Angula Momentum = m×v×r=mvr

If we increase mass

Here we replace m with 2m and keep the size same i-e radius is kept constant !

==> Angular Momentum = 2m×v×r=2mvr