Author Question: 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 ... (Read 74 times)

AEWBW · **on:** Jul 29, 2018

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