A mass is bouncing on the end of a spring with a period T when ...

[kamilo84]

A mass is bouncing on the end of a spring with a period T when measured by a ground observer. What would the period of oscillation be (as measured by the same observer) if the mass and spring were moving past the ground observer at a speed of 0.600c?
 a. 0.440 T
  c. 0.600 T
  b. 1.25 T
  d. 1.67 T

Question 2

I am stationary in a reference system but if my reference system is not an inertial reference system, then, relative to me, a system that is an inertial reference system must:
 a. be accelerating.
  c. remain at rest.
  b. move with constant velocity.
  d. be none of these choices.

[bigcheese9]

Answer to Question 1

B

Answer to Question 2

A

[kamilo84]

Thank you!

[bigcheese9]

Always glad to help...