What is the conversion factor between km/h and m/s? A) 7.72 ...

[AEWBW]

What is the conversion factor between km/h and m/s?
 
  A) 7.72  10-5 m/s
  B) 2.78  10-1 m/s
  C) 1.30  104 m/s
  D) 3.60 m/s
  E) 16.7 m/s

Question 2

A block of mass m is pushed against a spring of spring constant k. The spring is compressed by a distance d, the block is then released. It is launched by the spring along a horizontal frictionless surface with a final speed v.
 
  A second block, this one having mass 4m is pushed against the same spring and released, gaining a final speed 2v. By what distance was the spring compressed in the second case? A) d
  B) 2d
  C) 4d
  D) 16d
  E) 25d

[princessflame2016]

Answer to Question 1

B

Answer to Question 2

C

[AEWBW]

TYSM

[adf223]

Excellent