Multiple Choice
A mass of 4.0 kg,resting on a horizontal,frictionless surface,is attached on the right to a horizontal spring with spring constant 30 N/m and on the left to a horizontal spring with spring constant 50 N/m.If this system is moved from equilibrium,what is the effective spring constant?
A) 16 N/m
B) 80 N/m
C) 20 N/m
D) −20 N/m
Correct Answer:

Verified
Correct Answer:
Verified
Q11: A mass-spring system on a horizontal frictionless
Q42: Doubling the weight suspended vertically from a
Q43: A 2.0 cm <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5259/.jpg" alt="A 2.0
Q44: How large a force is necessary to
Q45: A simple pendulum has a mass of
Q46: If a long spring with spring constant
Q48: A mass on a spring vibrates in
Q49: A 0.20-kg block rests on a frictionless,level
Q51: A tiny spring,with a spring constant of
Q52: A simple pendulum has a period of