Material objects cannot be accelerated up to lightspeed because ...

[Tazate]

Material objects cannot be accelerated up to lightspeed because
 
  A) their length decreases toward zero as they approach lightspeed.
  B) of the curvature of space, which increases toward infinite curvature as the object approaches lightspeed.
  C) their inertia increases toward infinity, i.e., without bound as they approach lightspeed.
  D) nothing can move at the speed of light.
  E) Nonsense--objects can be sped up to lightspeed, as we can see from the example of light itself.

Question 2

Tarzan swings back and forth on a long vine. His friend Jane notices in amazement that he makes 30 complete swings in 2.4 minutes.
  (a) What is the frequency (in hertz) of Tarzan's swing?
  (b) How long is the vine he is using?
 
  What will be an ideal response?

[jonathanballen97]

Answer to Question 1

C

Answer to Question 2

(a) 0.21 Hz (b) 5.7 m

[Tazate]

Gracias!

[raenoj]

Excellent